Kill rule apps after cuj is executed.

Bug: 206704410
Test: youtube-pip-fix-1

Change-Id: I9c67fc8e3c1818458dc8485c2d7169df7a157986
diff --git a/libraries/health/rules/src/android/platform/test/rule/MapsPipRule.java b/libraries/health/rules/src/android/platform/test/rule/MapsPipRule.java
index 743810f..703afa9 100644
--- a/libraries/health/rules/src/android/platform/test/rule/MapsPipRule.java
+++ b/libraries/health/rules/src/android/platform/test/rule/MapsPipRule.java
@@ -51,7 +51,6 @@
 
     @Override
     protected void finished(Description description) {
-        sMapsHelper.get().backToNavigationFromPip();
-        sMapsHelper.get().exit();
+        executeShellCommand(String.format("am force-stop %s", sMapsHelper.get().getPackage()));
     }
 }
diff --git a/libraries/health/rules/src/android/platform/test/rule/YouTubePipRule.java b/libraries/health/rules/src/android/platform/test/rule/YouTubePipRule.java
index 49d702d..d407ebd 100644
--- a/libraries/health/rules/src/android/platform/test/rule/YouTubePipRule.java
+++ b/libraries/health/rules/src/android/platform/test/rule/YouTubePipRule.java
@@ -48,7 +48,6 @@
 
     @Override
     protected void finished(Description description) {
-        sYouTubeHelper.get().backFromYouTubeFromPip();
-        sYouTubeHelper.get().exit();
+        executeShellCommand(String.format("am force-stop %s", sYouTubeHelper.get().getPackage()));
     }
 }