Track alsa buffer underruns

Test: audioflinger dumpsys with instrumented sleeps
Bug: 135729709
Bug: 124764221
Change-Id: I43e21c03320ec598d970914d4569e404878a7894
(cherry picked from commit 1f203ea4bfd70695a5d1f3794a8bff9448a4f40b)
Signed-off-by: Aniket Kumar Lata <alata@codeaurora.org>
2 files changed