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 pull request #1 from CyanogenMod/cm-11.0

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