Default to compiling lite protos

Soong was incorrectly defaulting to compiling for full protos but
using the lite runtime.  Switch to compiling lite protos by default.

Fixes: 119714316
Test: m checkbuild
Change-Id: I0832b854f01f2acb10682e68ce7cc68753ca9dda
diff --git a/java/proto.go b/java/proto.go
index e013bb4..4d735eb 100644
--- a/java/proto.go
+++ b/java/proto.go
@@ -108,10 +108,10 @@
 		case "nano":
 			flags.proto.OutTypeFlag = "--javanano_out"
 			typeToPlugin = "javanano"
-		case "lite":
+		case "lite", "":
 			flags.proto.OutTypeFlag = "--java_out"
 			flags.proto.OutParams = append(flags.proto.OutParams, "lite")
-		case "full", "":
+		case "full":
 			flags.proto.OutTypeFlag = "--java_out"
 		default:
 			ctx.PropertyErrorf("proto.type", "unknown proto type %q",