Wait until the animation is complete before finishing the transition

This test is flaky because sometimes it stops in the middle of the animation, before the app layer occludes the launche

Bug: 202128862
Test: atest FlickerTests
Change-Id: If8c07db37be9df4c19cf6e3137bd18f3afa851fd

tests/FlickerTests/src/com/android/server/wm/flicker/launch/OpenAppFromOverviewTest.kt

@@ -27,6 +27,7 @@ import com.android.server.wm.flicker.helpers.reopenAppFromOverview
 import com.android.server.wm.flicker.helpers.setRotation
 import com.android.server.wm.flicker.startRotation
 import com.android.server.wm.flicker.dsl.FlickerBuilder
+import com.android.server.wm.traces.common.WindowManagerConditionsFactory
 import org.junit.FixMethodOrder
 import org.junit.Test
 import org.junit.runner.RunWith
@@ -78,6 +79,11 @@ class OpenAppFromOverviewTest(testSpec: FlickerTestParameter) : OpenAppTransitio
             }
             transitions {
                 device.reopenAppFromOverview(wmHelper)
+                wmHelper.waitFor(
+                        WindowManagerConditionsFactory.hasLayersAnimating().negate(),
+                        WindowManagerConditionsFactory.isWMStateComplete(),
+                        WindowManagerConditionsFactory.isHomeActivityVisible().negate()
+                )
                 wmHelper.waitForFullScreenApp(testApp.component)
             }
         }