Update audiorecord tests

1. Test that are duplicate of AudioRecordTest are removed.
2. Incorrect validation of buffer overrun scenario removed
3. Added few more test parameters (input flag fast)

Bug: 215776959
Test: atest audiorecord_tests

Merged-In: I75a6ad497f56ab0a53e764cd4f2bab8fed399bc2
Change-Id: I75a6ad497f56ab0a53e764cd4f2bab8fed399bc2