Ensure connection video capabilities can only be set if video supported.

Add check in setConnectionCapabilities to ensure that video capabilities
are not added to a Call if the underlying PhoneAccount does not
support video.  This is to protect against errors originating from lower
layers.

Bug: 28233279
Change-Id: I822445d1bb4459f3fa4a582bd9f9996d8b736ca3
1 file changed