aaudio_loopback: glitch locations, hang callback

Various improvements including:
Show frame number of first 32 glitches.
Show graph at first glitch.
Hang in the callback using -h{msec} option.

Test: Run glitch test for 20 seconds, hang for 40 msec
Test: adb shell aaudio_loopback -tm -s20 -h40
Change-Id: I8e0f7bfd89efe907c38093e65e7775f48adf88f7