AlsaThread calls AlsaLayer::openDevice() that may block 10s
if alsa device is busy. And this call is done 3 times!
It's a problem if it occures during thread join(), made at call hangup
for examble, blocking all the application until the thread die.

This patch reduces the timeout of openDevice to 2s and check
if thread exit is requested at each retry.

Issue: #75538
Change-Id: I3affa3869d039393677b57d2c9456f2ff1405264