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 T 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 T release.

Bug: 161145287
Test: Build
Change-Id: I552bd8c40996f8aead756163f9e244fe6a7c3223
diff --git a/src/com/android/camera/GalleryPicker.java b/src/com/android/camera/GalleryPicker.java
index 2f29691..a7d0655 100644
--- a/src/com/android/camera/GalleryPicker.java
+++ b/src/com/android/camera/GalleryPicker.java
@@ -282,7 +282,8 @@
         intentFilter.addAction(Intent.ACTION_MEDIA_EJECT);
         intentFilter.addDataScheme("file");
 
-        registerReceiver(mReceiver, intentFilter);
+        registerReceiver(mReceiver, intentFilter,
+                Context.RECEIVER_EXPORTED_UNAUDITED);
 
         getContentResolver().registerContentObserver(
                 MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
diff --git a/src/com/android/camera/ImageGallery.java b/src/com/android/camera/ImageGallery.java
index c4bdb84..bc050c7 100644
--- a/src/com/android/camera/ImageGallery.java
+++ b/src/com/android/camera/ImageGallery.java
@@ -467,7 +467,8 @@
                 }
             }
         };
-        registerReceiver(mReceiver, intentFilter);
+        registerReceiver(mReceiver, intentFilter,
+                Context.RECEIVER_EXPORTED_UNAUDITED);
         rebake(false, ImageManager.isMediaScannerScanning(
                 getContentResolver()));
     }