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
diff --git a/tools/aapt2/Android.bp b/tools/aapt2/Android.bp
index 740b44e..50cd455 100644
--- a/tools/aapt2/Android.bp
+++ b/tools/aapt2/Android.bp
@@ -165,6 +165,7 @@
     ],
     proto: {
         export_proto_headers: true,
+        type: "full",
     },
     defaults: ["aapt2_defaults"],
 }