stagefright: Allow devices to use older widevine blobs

Devices may have widevine plugins built with an older MediaSource
interface.  Trying to use them fails because of the change in
interface in the object (it calls the destructor in the blob when
attempting to call setBuffers).

This commit restores the interface for ! QCOM_HARDWARE devices.

Fixes: JIRA-4944.

Change-Id: I4ce24a16f3eceab0c4def4b09850ed569eb392ab
disable camera sounds (3/3)

Change-Id: Iff4eb5ca7dd13038bf852a76d0c605814864497a
Signed-off-by: Jonathan Steadman <xxwhitehawk@gmail.com>
screenrecord: Add audio support

Adds audio recording to the screenrecord system. Note that
while recording, the audio is muted from the device output,
and that the audio volume is controlled separately (so make
sure to turn up your volume if you hear nothing).
Audio from the microphone can also be recorded by adding
--microphone to the command line.

Change-Id: I97dfcaf3d93b786c5466e1f4215549e3d015bcf0
screenrecord: Enable SUBMIX_IN as well and cleanup on exit

While on Nexus 5/Nexus 7 (AOSP QCOM audio), trying to turn on
SUBMIX_IN fails and is not needed, it is required on Find 5
and N1 (CAF QCOM audio), or otherwise SUBMIX_OUT won't turn
on.
We also now release the audio routing as it wouldn't revive
the audio speakers otherwise.

Change-Id: I0f80a232304733e0b0a834b188b8cfa5b88915f3