audioflinger: exchange AUDIO_SOURCE_HOTWORD with AUDIO_SOURCE_VOICE_RECOGNITION for pre-kitkat blobs.

Change-Id: I6241cf6667c97dfd7fb1c238b1fbadea5cdb863e
Merge "audioflinger: exchange AUDIO_SOURCE_HOTWORD with AUDIO_SOURCE_VOICE_RECOGNITION for pre-kitkat blobs." into cm-11.0
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_frameworks_av into kitkat