Treat FLAG_MUTE_HAPTIC separately from mFlags.

For get/set APIs, FLAG_MUTE_HAPTIC is known as a boolean value instead
of a flag. In that case, it should not be changed when calling set flags
API to modify the flags. By doing this, it helps the FLAG_MUTE_HAPTIC is
set correctly.

Bug: 130670988
Test: Manually
Change-Id: I6a507d1f6f82e5ea6520f83279f73f851605c93f