Move SystemUI and its permissions to /product

Since this app is frequently customized by OEMs, it doesn't
fit in the mainline /system image right now. Move it to
/product.

Bug: 110072687
Test: make
Test: boot blueline
Test: atest SystemUITests
Change-Id: If27bcccd62f239f716db5ee7f4f1418d936e1cf4
diff --git a/packages/SystemUI/Android.bp b/packages/SystemUI/Android.bp
index c2e107a..ad44b9a 100644
--- a/packages/SystemUI/Android.bp
+++ b/packages/SystemUI/Android.bp
@@ -134,6 +134,7 @@
     ],
 
     platform_apis: true,
+    product_specific: true,
     certificate: "platform",
     privileged: true,