Move WAPPushManager to /product

WAPPushManager is not in mainline, thus move it to /product.

Bug: 138284376
Test: Boot aosp_cf_x86_phone
Change-Id: I65b530547a25efa501bafcfa986111f0f899211d
diff --git a/packages/WAPPushManager/Android.bp b/packages/WAPPushManager/Android.bp
index 1bec492..c391369 100644
--- a/packages/WAPPushManager/Android.bp
+++ b/packages/WAPPushManager/Android.bp
@@ -9,4 +9,6 @@
     optimize: {
         proguard_flags_files: ["proguard.flags"],
     },
+
+    product_specific: true,
 }
diff --git a/packages/WAPPushManager/CleanSpec.mk b/packages/WAPPushManager/CleanSpec.mk
index b84e1b6..2dcbb10 100644
--- a/packages/WAPPushManager/CleanSpec.mk
+++ b/packages/WAPPushManager/CleanSpec.mk
@@ -47,3 +47,5 @@
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************
+
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/app/WAPPushManager)