Tweak Speakerphone Volume to be more usable.

Increased Speakerphone Volume to be on par with Audio Speaker actual volume.

Change-Id: I7d9291fb094c14cdc9445f49f2b57443eb7e8441
Merge "Tweak Speakerphone Volume to be more usable." into cm-11.0
Merge remote-tracking branch 'cm/cm-11.0' into HEAD