Fix null pointer exception when checking whether to hide VVM settings.

VVM code assumes there is always metadata in an InCallService manifest
definition, where this may not be the case.

Test: Manual
Bug: 37103034
Merged-In: Ia0609e150f7805ae4239045007cad40e23cee3fa
Change-Id: Ia0609e150f7805ae4239045007cad40e23cee3fa
1 file changed