Run audio services in audioserver instead of mediaserver

audioflinger, audiopolicy, (fm) radio, soundtrigger moved to audioserver.
medialog is removed from mediaserver.
audioserver has same permissions and rights as mediaserver.

mediaserver is allowed to specify client uid to audioserver.

Subsequent CL will add medialog to audioserver.

TBD: Pare down permissions.

Bug: 24511453
Change-Id: Iccaa08b874a502710d142e72f8abbb3d97c44cfa