Move the app to /system_ext

As mentioned in go/partitions-in-r, we plan to forbid hidden API in
product partition.
So this app should be moved to /system_ext because it uses hidden API.
It is not permanent, so they can be moved back to /product due to
needs if there isn't hidden usage anymore.

Bug: 137908189
Test: m
Test: check whether device boots successfully
Change-Id: Id1e897eadea814b780f199fa7f3d683924eb4ab3
diff --git a/apps/SdkSetup/Android.bp b/apps/SdkSetup/Android.bp
index 6677773..ac45411 100644
--- a/apps/SdkSetup/Android.bp
+++ b/apps/SdkSetup/Android.bp
@@ -7,5 +7,14 @@
     optimize: {
         enabled: false,
     },
-    product_specific: true,
+    system_ext_specific: true,
+    required: ["privapp_whitelist_com.android.sdksetup"],
 }
+
+prebuilt_etc {
+    name: "privapp_whitelist_com.android.sdksetup",
+    system_ext_specific: true,
+    sub_dir: "permissions",
+    src: "com.android.sdksetup.xml",
+    filename_from_src: true,
+}
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