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/SystemUI/tests/AndroidManifest.xml b/packages/SystemUI/tests/AndroidManifest.xml
index d541c8f..e5847b0 100644
--- a/packages/SystemUI/tests/AndroidManifest.xml
+++ b/packages/SystemUI/tests/AndroidManifest.xml
@@ -46,7 +46,7 @@
     <uses-permission android:name="android.permission.DEVICE_POWER" />
     <uses-permission android:name="android.permission.READ_CONTACTS" />
     <uses-permission android:name="android.permission.STATUS_BAR" />
-    <uses-permission android:name="android.permission.MANAGE_ACTIVITY_STACKS" />
+    <uses-permission android:name="android.permission.MANAGE_ACTIVITY_TASKS" />
     <uses-permission android:name="android.permission.REAL_GET_TASKS" />
     <uses-permission android:name="android.permission.INTERNAL_SYSTEM_WINDOW" />
     <uses-permission android:name="android.permission.NETWORK_SETTINGS" />