Permissions check for Wifi Display configuration

Wifi Display is configured using the AIDL call setMiracastMode()
and using a message over the async channel SET_WFD_INFO.
Enforce permissions on the calling uid before updating the config

Bug: 18668877
Test: Unit tests
Change-Id: I0be2d2af49070aad759f24bd31331f7df39a0422
Merged-In: I0be2d2af49070aad759f24bd31331f7df39a0422
2 files changed