Added uninstall event metric handling and unit tests.

Change-Id: Ibaead8e08cea509610f644779a3e09de6fc44634
Flag: android.app.background_install_control_callback_api
Bug: 374120984
Test: atest
diff --git a/AconfigFlags.bp b/AconfigFlags.bp
index e184704..a6b8613 100644
--- a/AconfigFlags.bp
+++ b/AconfigFlags.bp
@@ -966,6 +966,13 @@
     defaults: ["framework-minus-apex-aconfig-java-defaults"],
 }
 
+java_aconfig_library {
+    name: "android.app.flags-aconfig-java-host",
+    aconfig_declarations: "android.app.flags-aconfig",
+    host_supported: true,
+    defaults: ["framework-minus-apex-aconfig-java-defaults"],
+}
+
 // Broadcast Radio
 aconfig_declarations {
     name: "android.hardware.radio.flags-aconfig",