Add support for allow-permission extension.
This will grant packages arbitrary permissions as defined by XML files
in /system/etc/permissions.

Change-Id: Icb69a2be248a515e621c5292187863cdc5e3ebe6
Remote display framework support.

Any app can use the remote display APIs to mirror to another device...
This can be used to implement AirPlay, Chromecast, or even screen recording.

Change-Id: I6f45b393afb2f9d438d4aa548e8149946741c928
NsdManager: add dns txt record support

Change-Id: I10771a1b96aefb76c6dc8aa456408687906059b3