audio policy: remove capture restrictions for IN_COMMUNICATION mode

Remove capture restrictions added to prevent apps from capturing
when audio mode is IN_COMMUNICATION if they are not the audio mode
owner.

Bug: 153934174
Bug: 160260850
Test: repro steps in bug.
Test: regression for VoIP calls
Test: atest AudioManagerTest#testAccessMode
Test: atest AudioRecordTest
Change-Id: Iba423e0aceec7e07089440ad1efb9e1325953305