cfb25d1036
Do not open the input device when opening the input stream but only when the input stream starts. This avoids blocking the thread executing openInputStream() on the pcm input driver mutex while this mutex is constantly acquired and released by the high priority audio input thread. It also allows an app to open an input stream while another thread is recording if it does not use it immediately (useful for voice search and VoIP). Also did some clean up in output and input stream standby logic. Change-Id: I69c82f5833f7a034d828001f87e02745d7683b65