device list, Android: list front-facing cameras before back-facing cameras
device list: more g_debug/g_warning/g_error, less g_print
bindings/java: fixed issue when converting returned c-types to java
Merge branches 'device-listing-fixes', 'binginds-jni-return-fix', 'sdp-candidate', 'enums' and 'android-log-filter' into android-native-branches