libaudio: complete overhaul for kitkat

Change-Id: Ia927174384efe1f7fd4896f852b275179eb7f087
move phone overlay to telephony service

Change-Id: Ib9098025e5d1eaabad53a85f781cf06f5b9ee0fd
add internal emulated storage and update storages for kitkat

External SD card can't be set as primary storage in KitKat.
http://source.android.com/devices/tech/storage/index.html
remove unused webkit flags

KitKat has a brand new Chromium WebView.

Change-Id: I9538aa272185a1fd0bd35f7206b41e1bfe3afbc2
media_profiles: update for kitkat

480p is the lowest supported profile in kitkat. Also happens to
be the highest our harware is capable of. :P

Change-Id: I2cb5b7a5e4526dc524cffbfb18676dc24fa252f9
media_codecs: update for kitkat