audio_hw: Check if usb device is removed before opening stream am: d9653bdbca
am: d8578f13a0

Change-Id: If58c3a0bbb45a5e85fbadb0612e8842e9636b785
tree: 533afceae38e1f42c8220205f7777893eeeb9ab8
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk