Fix signature of recently changed methods

BluetoothHeadset methods startScoUsingVirtualVoiceCall and
stopScoUsingVirtualVoiceCall recently changed their signature.
Fix this in the hiddenapi-light-greylist.txt to unblock the build.

Test: make out/target/common/obj/PACKAGING/hiddenapi-blacklist.txt
Merged-In: Id50db88f4ff36069b0f392c81dd9d90c24cd2206
Change-Id: I295886b0cd35936d0b8c1a8e4a9b9c5054dda001