Re-enable volume control for non-grouped devices

Bug: 197586676
Bug: 202500642
Test: make -j50 RunSettingsRoboTests
Merged-In: I7740d78f3a7dca62d64e6cf7b8c9ffa1578c8e74
Change-Id: I7740d78f3a7dca62d64e6cf7b8c9ffa1578c8e74
(cherry picked from commit b7f52f4468a1daa7408e44fafb362b54eec20897)
Merged-In:I7740d78f3a7dca62d64e6cf7b8c9ffa1578c8e74
1 file changed