Catch all exceptions when retrieving ComposedIconInfo

It is possible to receive a TransactionTooLargeException when
getting the composed icon info from the package manager service.
We should catch these exceptions to avoid unnecessary crashes.

For reference:
The Binder transaction buffer has a limited fixed size, currently 1Mb,
which is shared by all transactions in progress for the process.
Consequently this exception can be thrown when there are many transactions
in progress even when most of the individual transactions are of moderate size.

see http://developer.android.com/reference/android/os/TransactionTooLargeException.html
for more details.

Change-Id: I70d35dc4926125bfbef5d8c5fb8ed6d6fcdbf159
Add SET_WALLPAPER permission to SystemUI

If an exception is thrown in updateWallpaperLocked, a call to
WallpaperManager.clear() is made.  This requires the SET_WALLPAPER
permission and will throw a SecurityException if that permission
is not granted to SystemUI.

Change-Id: I61811b65dcfe8b15f0e9030f7aa6d1dc09cea351
AudioManager: Add Bluetooth A2DP profile trigger

    - Introduce a new profile trigger for Bluetooth A2DP
      connections.  We can't use the default ACTION_ACL_CONNECTED
      because it would apply the volume settings before routing
      has been established to the A2DP device.
    - Modify AudioService to send an intent after the audio
      route has changed to A2DP to ensure our volume change
      will apply to the correct device.
    - Allows the user to disable the A2DP profile and still
      trigger the profile change.

Fixes JIRA issue: BACON-47

Change-Id: Ib51dac6d79abbaf494b86af4480e293162814459