Add unaudited exported flag to exposed runtime receivers

Android T allows apps to declare a runtime receiver as not exported
by invoking registerReceiver with a new RECEIVER_NOT_EXPORTED flag;
receivers registered with this flag will only receive broadcasts from
the platform and the app itself. However to ensure developers can
properly protect their receivers, all apps targeting U or later
registering a receiver for non-system broadcasts must specify either
the exported or not exported flag when invoking #registerReceiver;
if one of these flags is not provided, the platform will throw a
SecurityException. This commit updates all the exposed receivers
with a new RECEIVER_EXPORTED_UNAUDITED flag to maintain the existing
behavior of exporting the receiver while also flagging the receiver
for audit before the U release.

Bug: 234659204
Test: Build
Change-Id: Ifd4006b13a2274590e46fed632fa2f0b40329c53

services/core/java/com/android/server/vibrator/VibrationSettings.java

@@ -655,7 +655,8 @@ final class VibrationSettings {
     }
 
     private void registerSettingsChangeReceiver(IntentFilter intentFilter) {
-        mContext.registerReceiver(mSettingChangeReceiver, intentFilter);
+        mContext.registerReceiver(mSettingChangeReceiver, intentFilter,
+                Context.RECEIVER_EXPORTED_UNAUDITED);
     }
 
     @Nullable