Return non-zero channel mask for orphan effects

Bug: 330202134
Bug: 309578734
Test: atest audioeffect_tests
Test: atest CtsMediaAudioTestCases
Change-Id: I142409abf56f15e9102df81194fe90c36cfa6be3
Merged-In: I142409abf56f15e9102df81194fe90c36cfa6be3
1 file changed