Remove @FlakyTest from no longer flaky test

Change-Id: I2d220717a3f959c02bd8c746ac2110289d3c95c7
Test: atest WMShellFlickerTest:ExitPipViaExpandButtonClickTest
Bug: 219750830
Bug: 197726610

libs/WindowManager/Shell/tests/flicker/src/com/android/wm/shell/flicker/pip/ExitPipViaExpandButtonClickTest.kt

@@ -16,7 +16,6 @@
 
 package com.android.wm.shell.flicker.pip
 
-import android.platform.test.annotations.FlakyTest
 import android.view.Surface
 import androidx.test.filters.RequiresDevice
 import com.android.server.wm.flicker.FlickerParametersRunnerFactory
@@ -54,7 +53,6 @@ import org.junit.runners.Parameterized
 @Parameterized.UseParametersRunnerFactory(FlickerParametersRunnerFactory::class)
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
 @Group3
-@FlakyTest(bugId = 219750830)
 class ExitPipViaExpandButtonClickTest(
     testSpec: FlickerTestParameter
 ) : ExitPipToAppTransition(testSpec) {
@@ -80,11 +78,6 @@ class ExitPipViaExpandButtonClickTest(
             }
         }
 
-    /** {@inheritDoc}  */
-    @FlakyTest(bugId = 197726610)
-    @Test
-    override fun pipLayerExpands() = super.pipLayerExpands()
-
     companion object {
         /**
          * Creates the test configurations.