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The problem is that the code in AudioPolicyManagerBase::checkAndSetVolume() that forces
voice volume to max when setting bluetooth SCO volume is not called if the bluetooth stream
volume did not actually change. So even if we re apply volumes when switching to bluetooth
device, the voice volume is not changed in audio HAL and remains what it was when routed to earpiece.
What makes things worse on Passion is that stream volumes are limited when connected to bluetooth
and their actual value does not change as soon as they exceed the limit threshold.

Change-Id: Ieb72a71e06e9b3079cc8bc76c78ce83e060a2ea2