update-makefiles.sh: for partial Java pkgs

Packages which contain some non-supported Java types can still have
their Java-supported types used in Java.

Bug: 143566068
Test: mma
Change-Id: I2afc5cc8d0a1bd981108ee2b87d6033fd48bdb37
diff --git a/audio/common/5.0/Android.bp b/audio/common/5.0/Android.bp
index be0f59e..761c171 100644
--- a/audio/common/5.0/Android.bp
+++ b/audio/common/5.0/Android.bp
@@ -12,6 +12,6 @@
     interfaces: [
         "android.hidl.safe_union@1.0",
     ],
-    gen_java: false,
+    gen_java: true,
     gen_java_constants: true,
 }