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Use the wrapped volume interface with the AVRCP conneciton handler
Use the wrapped volume interface in connection handler so that JNI calls are automatically executed on the correct thread when called from the connection handler. Bug: 30602783 Test: Connect a device that doesn't support absolute volume and see that the JNI call doesn't throw an exception. Change-Id: Ife768c715022e70dd4055270c1d6cf76ba26aea3