Support for showing self-managed calls in IncallService.

Also added new isInManagedCall TelecomManager API, used to determine if
there are ongoing managed calls only.

Test: Manual, cts
Bug: 34159263
Change-Id: Ib8020617607ccb433c2eee9b9d5a2c929665214b
diff --git a/telecomm/java/android/telecom/Call.java b/telecomm/java/android/telecom/Call.java
index c69b7c2..f129c33 100644
--- a/telecomm/java/android/telecom/Call.java
+++ b/telecomm/java/android/telecom/Call.java
@@ -312,8 +312,15 @@
          */
         public static final int PROPERTY_HAS_CDMA_VOICE_PRIVACY = 0x00000080;
 
+        /**
+         * Indicates that the call is from a self-managed {@link ConnectionService}.
+         * <p>
+         * See also {@link Connection#PROPERTY_SELF_MANAGED}
+         */
+        public static final int PROPERTY_SELF_MANAGED = 0x00000100;
+
         //******************************************************************************************
-        // Next PROPERTY value: 0x00000100
+        // Next PROPERTY value: 0x00000200
         //******************************************************************************************
 
         private final String mTelecomCallId;