FM: Fix ANR due to incorrect error handling in stopRecording

stopRecording() API gets called from onRecordingStopped() callback
function. As a result, when recording can't be stopped successfully
in error scenarios, stopRecording() gets called in loop.

This fix removes the call stopRecording() from callback function and
does the required UI update.

CRs-Fixed: 943288
Change-Id: I0e2ea2adeb0c603f16541d04a5a244bc1fcd51d7