Deprecate MANAGE_ACTIVITY_STACKS permission

Adding MANAGE_ACTIVITY_TASKS permission as the replacement, but
still grant the deprecated MANAGE_ACTIVITY_STACKS permission for
app compatibility.

Bug: 157876448
Test: presubmit

Change-Id: I894ee66e058b1024a731d3be4b33b69626451f08
diff --git a/packages/Shell/AndroidManifest.xml b/packages/Shell/AndroidManifest.xml
index 5f018a0..ba4bda9 100644
--- a/packages/Shell/AndroidManifest.xml
+++ b/packages/Shell/AndroidManifest.xml
@@ -143,7 +143,7 @@
     <uses-permission android:name="android.permission.MANAGE_APP_OPS_MODES" />
     <uses-permission android:name="android.permission.VIBRATE" />
     <uses-permission android:name="android.permission.ACCESS_VIBRATOR_STATE" />
-    <uses-permission android:name="android.permission.MANAGE_ACTIVITY_STACKS" />
+    <uses-permission android:name="android.permission.MANAGE_ACTIVITY_TASKS" />
     <uses-permission android:name="android.permission.START_TASKS_FROM_RECENTS" />
     <uses-permission android:name="android.permission.START_ACTIVITIES_FROM_BACKGROUND" />
     <uses-permission android:name="android.permission.ACTIVITY_EMBEDDING" />