TIF: add helper methods for making a channel browsable.

Test: build and manually tested with a local app.
Bug: 36395259, Bug: 36097352
Change-Id: I512ed6f4da21af01445fdbcd2f200a681c5dde19
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 8895877..8225494 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -535,6 +535,7 @@
     <protected-broadcast android:name="android.media.tv.action.PREVIEW_PROGRAM_ADDED_TO_WATCH_NEXT" />
     <protected-broadcast android:name="android.media.tv.action.PREVIEW_PROGRAM_BROWSABLE_DISABLED" />
     <protected-broadcast android:name="android.media.tv.action.WATCH_NEXT_PROGRAM_BROWSABLE_DISABLED" />
+    <protected-broadcast android:name="android.media.tv.action.CHANNEL_BROWSABLE_REQUESTED" />
 
     <!-- ====================================================================== -->
     <!--                          RUNTIME PERMISSIONS                           -->