fix screenrecord abort issues

Change-Id: Ic065d4cdd92cfa7abbaafd8e17f6e9d4cf397562
media: Kill incessant logspam during latency measurement WTF

Change-Id: I79059c176f6c1fb922f48596bc2e078461b09320
stagefright: Don't enforce 16kHz rate for AMR-WB

This breaks android.media.cts.MediaRecorderTest#testRecordingAudioInRawFormats,
which tests specifically with 8kHz.

Change-Id: Ibfa54db4b2a82e502268be18f4ea405a41a88bfd