Tapl library

The public API of the library has finalized; flakiness has been removed;
code polished.

Bug: 110103162
Test: TaplTests suite
Change-Id: Ic156bbfeedb1cb9c4a48ef907f97e396e8e81936

src/com/android/launcher3/touch/AbstractStateChangeTouchController.java

@@ -43,6 +43,7 @@ import com.android.launcher3.Utilities;
 import com.android.launcher3.anim.AnimationSuccessListener;
 import com.android.launcher3.anim.AnimatorPlaybackController;
 import com.android.launcher3.anim.AnimatorSetBuilder;
+import com.android.launcher3.compat.AccessibilityManagerCompat;
 import com.android.launcher3.userevent.nano.LauncherLogProto;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action.Direction;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action.Touch;
@@ -515,6 +516,8 @@ public abstract class AbstractStateChangeTouchController
                 logReachedState(logAction, targetState);
             }
             mLauncher.getStateManager().goToState(targetState, false /* animated */);
+
+            AccessibilityManagerCompat.sendEventToTest(mLauncher, "TAPL_WENT_TO_STATE");
         }
     }