Move test to presubmit

testSplitAppFromHomeWithItself() has been in postsubmit for approx. 4 months with no major flakes, moving to presubmit

Fixes: 270201357
Test: Android Test Investigate reports 2/45 test failure rate
Change-Id: I13cd5bc9e0ba376ffe97e8e61ed577a51b59bdb4
diff --git a/quickstep/tests/src/com/android/quickstep/TaplTestsSplitscreen.java b/quickstep/tests/src/com/android/quickstep/TaplTestsSplitscreen.java
index 2ae512a..e8cadab 100644
--- a/quickstep/tests/src/com/android/quickstep/TaplTestsSplitscreen.java
+++ b/quickstep/tests/src/com/android/quickstep/TaplTestsSplitscreen.java
@@ -23,7 +23,6 @@
 
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.ui.TaplTestsLauncher3;
-import com.android.launcher3.util.rule.TestStabilityRule;
 import com.android.quickstep.TaskbarModeSwitchRule.TaskbarModeSwitch;
 
 import org.junit.After;
@@ -61,10 +60,6 @@
     }
 
     @Test
-    // TODO (b/270201357): When this test is proven stable, remove this TestStabilityRule and
-    //  introduce into presubmit as well.
-    @TestStabilityRule.Stability(
-            flavors = TestStabilityRule.LOCAL | TestStabilityRule.PLATFORM_POSTSUBMIT)
     @PortraitLandscape
     @TaskbarModeSwitch
     public void testSplitAppFromHomeWithItself() throws Exception {