Add OP_ENABLE_MOBILE_DATA_BY_USER

Add an app op that will be noted when the user enables or disables
mobile data.

Bug: 222650148
Test: atest CtsAppOpTestCases
Change-Id: Ide84055fd5180e4134ed086194a7dfeb44e47d19
diff --git a/AconfigFlags.bp b/AconfigFlags.bp
index 3a772e1..a1f77e3 100644
--- a/AconfigFlags.bp
+++ b/AconfigFlags.bp
@@ -415,6 +415,7 @@
     defaults: ["framework-minus-apex-aconfig-java-defaults"],
     min_sdk_version: "30",
     apex_available: [
+        "//apex_available:platform",
         "com.android.permission",
     ],