Add a flag for voip app actions and tag relevant API.

This CL defines a new feature flag in Telecom to be used to signal when support for additional VOIP app actions is active. This CL also tags the PROPERTY_IS_TRANSACTIONAL API with that flag.

Test: manual
Fixes: 297436628
Change-Id: I812ad5286410b7842ab74e9f6cd282ad1227c119
diff --git a/flags/Android.bp b/flags/Android.bp
index 6d4795b..4c5c319 100644
--- a/flags/Android.bp
+++ b/flags/Android.bp
@@ -24,6 +24,7 @@
     srcs: [
       "telecom_broadcast_flags.aconfig",
       "telecom_ringer_flag_declarations.aconfig",
+      "telecom_api_flags.aconfig",
     ],
 }
 
diff --git a/flags/telecom_api_flags.aconfig b/flags/telecom_api_flags.aconfig
new file mode 100644
index 0000000..e956a38
--- /dev/null
+++ b/flags/telecom_api_flags.aconfig
@@ -0,0 +1,8 @@
+package: "com.android.server.telecom.flags"
+
+flag {
+  name: "voip_app_actions_support"
+  namespace: "telecom"
+  description: "When set, Telecom support for additional VOIP application actions is active."
+  bug: "296934278"
+}
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