Change deptag for sdk deps to help distinguish

Test: m nothing before and after and diff build.ninja files
Change-Id: Idc4c7f86d3e626bd1ee2f90ae3c6fb755644a605
diff --git a/java/aar.go b/java/aar.go
index d5996ba..a4324e0 100644
--- a/java/aar.go
+++ b/java/aar.go
@@ -439,7 +439,7 @@
 		switch depTag {
 		case instrumentationForTag:
 			// Nothing, instrumentationForTag is treated as libTag for javac but not for aapt2.
-		case libTag:
+		case sdkLibTag, libTag:
 			if exportPackage != nil {
 				sharedLibs = append(sharedLibs, exportPackage)
 			}