Promote/demote flicker tests

Promote stable postsubmit to presubmit
Demote unstable postsubmit to flaky
Demote fass assertions to flaky

Test: atest FlickerTests WMShellFlickerTests
Change-Id: Ib652d9951794b7bf27ffcfd16f4f342bfbf2b2e2

libs/WindowManager/Shell/tests/flicker/src/com/android/wm/shell/flicker/apppairs/AppPairsTestPairPrimaryAndSecondaryApps.kt

@@ -16,7 +16,6 @@
 
 package com.android.wm.shell.flicker.apppairs
 
-import android.platform.test.annotations.Postsubmit
 import android.platform.test.annotations.Presubmit
 import androidx.test.filters.FlakyTest
 import androidx.test.filters.RequiresDevice
@@ -68,7 +67,7 @@ class AppPairsTestPairPrimaryAndSecondaryApps(
     @Test
     override fun navBarLayerRotatesAndScales() = super.navBarLayerRotatesAndScales()
 
-    @Postsubmit
+    @Presubmit
     @Test
     override fun statusBarLayerRotatesScales() {
         // This test doesn't work in shell transitions because of b/206753786

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

@@ -16,7 +16,6 @@
 
 package com.android.wm.shell.flicker.pip
 
-import android.platform.test.annotations.Postsubmit
 import android.platform.test.annotations.Presubmit
 import android.view.Surface
 import androidx.test.filters.FlakyTest
@@ -96,7 +95,7 @@ class SetRequestedOrientationWhilePinnedTest(
         super.statusBarLayerRotatesScales()
     }
 
-    @Postsubmit
+    @Presubmit
     @Test
     fun pipWindowInsideDisplay() {
         testSpec.assertWmStart {
@@ -112,7 +111,7 @@ class SetRequestedOrientationWhilePinnedTest(
         }
     }
 
-    @Postsubmit
+    @Presubmit
     @Test
     fun pipLayerInsideDisplay() {
         testSpec.assertLayersStart {
@@ -126,7 +125,7 @@ class SetRequestedOrientationWhilePinnedTest(
         this.isAppWindowVisible(pipApp.component)
     }
 
-    @Postsubmit
+    @Presubmit
     @Test
     fun pipAppLayerCoversFullScreen() {
         testSpec.assertLayersEnd {