I import all libs as per your instruction. it isn't work on prelollipop android version .
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="24dp"
android:height="24dp"
android:viewportHeight="24.0"
android:viewportWidth="24.0">
<path
android:fillColor="@android:color/white"
android:pathData="M20,11L7.8,11l5.6,-5.6L12,4l-8,8l8,8l1.4,-1.4L7.8,13L20,13L20,11z"/>
</vector>
04-13 11:42:45.072: E/AndroidRuntime(29999): FATAL EXCEPTION: main
04-13 11:42:45.072: E/AndroidRuntime(29999): Process: com.example.vrs.collapsingtoolbardemo, PID: 29999
04-13 11:42:45.072: E/AndroidRuntime(29999): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.vrs.collapsingtoolbardemo/com.example.vrs.collapsingtoolbardemo.LauncherActivity}: android.content.res.Resources$NotFoundException: File res/drawable/abc_vector_test.xml from drawable resource ID #0x7f020052
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2318)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2396)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.app.ActivityThread.access$800(ActivityThread.java:139)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1293)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.os.Handler.dispatchMessage(Handler.java:102)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.os.Looper.loop(Looper.java:149)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.app.ActivityThread.main(ActivityThread.java:5268)
04-13 11:42:45.072: E/AndroidRuntime(29999): at java.lang.reflect.Method.invokeNative(Native Method)
04-13 11:42:45.072: E/AndroidRuntime(29999): at java.lang.reflect.Method.invoke(Method.java:515)
04-13 11:42:45.072: E/AndroidRuntime(29999): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-13 11:42:45.072: E/AndroidRuntime(29999): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
04-13 11:42:45.072: E/AndroidRuntime(29999): at dalvik.system.NativeStart.main(Native Method)
04-13 11:42:45.072: E/AndroidRuntime(29999): Caused by: android.content.res.Resources$NotFoundException: File res/drawable/abc_vector_test.xml from drawable resource ID #0x7f020052
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.content.res.Resources.loadDrawable(Resources.java:2156)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.content.res.Resources.loadDrawable(Resources.java:2075)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.content.res.Resources.getDrawable(Resources.java:706)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:374)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:202)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:190)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v7.widget.AppCompatDrawableManager.checkVectorDrawableSetup(AppCompatDrawableManager.java:711)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:195)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v7.widget.TintTypedArray.getDrawableIfKnown(TintTypedArray.java:81)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v7.app.AppCompatDelegateImplBase.<init>(AppCompatDelegateImplBase.java:131)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v7.app.AppCompatDelegateImplV9.<init>(AppCompatDelegateImplV9.java:155)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v7.app.AppCompatDelegateImplV11.<init>(AppCompatDelegateImplV11.java:31)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v7.app.AppCompatDelegateImplV14.<init>(AppCompatDelegateImplV14.java:55)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:205)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v7.app.AppCompatDelegate.create(AppCompatDelegate.java:185)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v7.app.AppCompatActivity.getDelegate(AppCompatActivity.java:519)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:71)
04-13 11:42:45.072: E/AndroidRuntime(29999): at com.example.vrs.collapsingtoolbardemo.LauncherActivity.onCreate(LauncherActivity.java:19)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.app.Activity.performCreate(Activity.java:5411)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2270)
04-13 11:42:45.072: E/AndroidRuntime(29999): ... 11 more
04-13 11:42:45.072: E/AndroidRuntime(29999): Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #17: invalid drawable tag vector
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:933)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.graphics.drawable.Drawable.createFromXml(Drawable.java:877)
04-13 11:42:45.072: E/AndroidRuntime(29999): at android.content.res.Resources.loadDrawable(Resources.java:2152)
04-13 11:42:45.072: E/AndroidRuntime(29999): ... 31 more