tree 41fd2860dbdde59d360043ee87fa756f8dd40fb7
parent 168493604a2cfba4bc9b9bbd48308e7bfbb8fe15
author LiuShang <liushang@thundersoft.com> 1424168411 +0800
committer Borjan Tchakaloff <borjan@fairphone.com> 1536150515 +0000

Enable microphone selection

Expose the device's microphones for testing purposes through the
HAL. One has to pass a specific parameter to the `AudioManager`,
namely 'fp_test'. Accepted values are:
* 'primary_mic'
* 'secondary_mic'
* any other value to disable the microphone selection and reset
  the default behaviour

Note that there is no safeguard check, if one selects a microphone,
the test mode will be entered and will only be left when the
`AudioManager` receiveds the third possible 'fp_test' value.

Issue: FPIIM-641
Issue: FP2N-293
Change-Id: I291162ca42c200ff3bed62901f71aa84ebc5ccb6
Depends-On: I5c4067702910a269386c6517d9368012066da976
(cherry picked from commit b4dac619d496add06f6dd8fb8db172153983f096)