aaudio: prevent memory leak from double configure

Prevent AudioEndpoint from being configure()d twice.
Check return value of AudioEndpoint.configure().
Prevent AudioStreamInternal from being open()ed twice.

Bug: 64522125
Test: adb shell dumpsys media.audio_flinger --unreachable
Change-Id: I3ae07af5610fd1f9e539f884923f781eefcd645f
2 files changed