Add PACKAGE_USAGE_STATS permission to shell.

This is needed for calling AM.registerUidObserver.

Fixes: 64400666
Test: cts-tradefed run singleCommand cts-dev -m CtsAppTestCases -t \
      android.app.cts.ActivityManagerProcessStateTest
Change-Id: I4f500d0d8d516b6b8961ea2f8c083add3ae949a9
diff --git a/packages/Shell/AndroidManifest.xml b/packages/Shell/AndroidManifest.xml
index bd1ebb9..b758e7f5 100644
--- a/packages/Shell/AndroidManifest.xml
+++ b/packages/Shell/AndroidManifest.xml
@@ -62,6 +62,7 @@
     <!-- Internal permissions granted to the shell. -->
     <uses-permission android:name="android.permission.FORCE_BACK" />
     <uses-permission android:name="android.permission.BATTERY_STATS" />
+    <uses-permission android:name="android.permission.PACKAGE_USAGE_STATS" />
     <uses-permission android:name="android.permission.INTERNAL_SYSTEM_WINDOW" />
     <uses-permission android:name="android.permission.INJECT_EVENTS" />
     <uses-permission android:name="android.permission.RETRIEVE_WINDOW_CONTENT" />