Change aapt2 to specify full protos

Soong's cc support for protos is inconsistent, it adds a dependency on
lite proto library is proto.type is unspecified, but builds as full.
Update aapt2 to explicitly build full protos rather than rely on
Soong's inconsistent defaulting of proto.type

Test: CI
Change-Id: I5600d04c7ac32a04fd2b230912e02280a3874812