[Android] Fix the crash of GetUserMedia

Crash happens when releasing the audio resource of localusermedia in
opensl. On Android there are two ways to get the audio input: opensl
and java Recording API. We swtich to the Recording API as a workaroud
of the bug. The limitation is Recording API only be avaiable after
version 15 of SDK.

BUG=XWALK-1833
Style problem.