Expose adhoc conference calling API as public.

Bug: 159944852
Test: make
Change-Id: I2cf39a6fd8a02ca4f2d0c83c484ab12bb13f74c3
diff --git a/telecomm/java/android/telecom/ConnectionService.java b/telecomm/java/android/telecom/ConnectionService.java
index 1b60e48..95c238e 100755
--- a/telecomm/java/android/telecom/ConnectionService.java
+++ b/telecomm/java/android/telecom/ConnectionService.java
@@ -2638,15 +2638,15 @@
         return null;
     }
     /**
-     * Create a {@code Connection} given an incoming request. This is used to attach to existing
-     * incoming conference call.
+     * Create a {@code Conference} given an incoming request. This is used to attach to an incoming
+     * conference call initiated via
+     * {@link TelecomManager#addNewIncomingConference(PhoneAccountHandle, Bundle)}.
      *
      * @param connectionManagerPhoneAccount See description at
      *         {@link #onCreateOutgoingConnection(PhoneAccountHandle, ConnectionRequest)}.
-     * @param request Details about the incoming call.
-     * @return The {@code Connection} object to satisfy this call, or {@code null} to
+     * @param request Details about the incoming conference call.
+     * @return The {@code Conference} object to satisfy this call, or {@code null} to
      *         not handle the call.
-     * @hide
      */
     public @Nullable Conference onCreateIncomingConference(
             @Nullable PhoneAccountHandle connectionManagerPhoneAccount,
@@ -2731,7 +2731,6 @@
      * @param connectionManagerPhoneAccount See description at
      *         {@link #onCreateOutgoingConnection(PhoneAccountHandle, ConnectionRequest)}.
      * @param request The incoming connection request.
-     * @hide
      */
     public void onCreateIncomingConferenceFailed(
             @Nullable PhoneAccountHandle connectionManagerPhoneAccount,
@@ -2752,7 +2751,6 @@
      * @param connectionManagerPhoneAccount See description at
      *         {@link #onCreateOutgoingConnection(PhoneAccountHandle, ConnectionRequest)}.
      * @param request The outgoing connection request.
-     * @hide
      */
     public void onCreateOutgoingConferenceFailed(
             @Nullable PhoneAccountHandle connectionManagerPhoneAccount,
@@ -2801,7 +2799,8 @@
 
     /**
      * Create a {@code Conference} given an outgoing request. This is used to initiate new
-     * outgoing conference call.
+     * outgoing conference call requested via
+     * {@link TelecomManager#startConference(List, Bundle)}.
      *
      * @param connectionManagerPhoneAccount The connection manager account to use for managing
      *         this call.
@@ -2821,7 +2820,6 @@
      * @param request Details about the outgoing call.
      * @return The {@code Conference} object to satisfy this call, or the result of an invocation
      *         of {@link Connection#createFailedConnection(DisconnectCause)} to not handle the call.
-     * @hide
      */
     public @Nullable Conference onCreateOutgoingConference(
             @Nullable PhoneAccountHandle connectionManagerPhoneAccount,