Prepare content capture flag for moving work to background

Test: Manually test with flag
BUG: 309411951
Change-Id: Id50dadfa08add1bfe9463802aab596b6082680c1

AconfigFlags.bp

@@ -58,6 +58,7 @@ aconfig_srcjars = [
     ":com.android.net.flags-aconfig-java{.generated_srcjars}",
     ":device_policy_aconfig_flags_lib{.generated_srcjars}",
     ":surfaceflinger_flags_java_lib{.generated_srcjars}",
+    ":android.view.contentcapture.flags-aconfig-java{.generated_srcjars}",
 ]
 
 filegroup {
@@ -659,3 +660,16 @@ java_aconfig_library {
     aconfig_declarations: "surfaceflinger_flags",
     defaults: ["framework-minus-apex-aconfig-java-defaults"],
 }
+
+// Content Capture
+aconfig_declarations {
+    name: "android.view.contentcapture.flags-aconfig",
+    package: "android.view.contentcapture.flags",
+    srcs: ["core/java/android/view/contentcapture/flags/*.aconfig"],
+}
+
+java_aconfig_library {
+    name: "android.view.contentcapture.flags-aconfig-java",
+    aconfig_declarations: "android.view.contentcapture.flags-aconfig",
+    defaults: ["framework-minus-apex-aconfig-java-defaults"],
+}

core/java/android/view/contentcapture/flags/content_capture_flags.aconfig

+package: "android.view.contentcapture.flags"
+
+flag {
+    name: "run_on_background_thread_enabled"
+    namespace: "machine_learning"
+    description: "Feature flag for running content capture tasks on background thread"
+    bug: "309411951"
+}