Fix 2194140: [Passion] Support Audience chip.

Added new input device DEVICE_IN_BACK_MIC.
Added new audio source AUDIO_SOURCE_CAMCORDER.
diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index a7c8a0a..e066177 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -257,11 +257,12 @@
         DEVICE_IN_WIRED_HEADSET = 0x100000,
         DEVICE_IN_AUX_DIGITAL = 0x200000,
         DEVICE_IN_VOICE_CALL = 0x400000,
+        DEVICE_IN_BACK_MIC = 0x800000,
         DEVICE_IN_DEFAULT = 0x80000000,
 
         DEVICE_IN_ALL = (DEVICE_IN_COMMUNICATION | DEVICE_IN_AMBIENT | DEVICE_IN_BUILTIN_MIC |
                 DEVICE_IN_BLUETOOTH_SCO_HEADSET | DEVICE_IN_WIRED_HEADSET | DEVICE_IN_AUX_DIGITAL |
-                DEVICE_IN_VOICE_CALL| DEVICE_IN_DEFAULT)
+                DEVICE_IN_VOICE_CALL | DEVICE_IN_BACK_MIC | DEVICE_IN_DEFAULT)
     };
 
     // device connection states used for setDeviceConnectionState()