Add new DisconnectCause class to telecomm.

+ Add a hidden "UNKNOWN" default type to ToneGenerator.
- Hide the Telephony DisconnectCause from the public API.
+ Add a Telecomm DisconnectCause. This is parcelable, and contains
information (code, user facing message, non-user facing reason,
and tone) to help describe the disconnect state and what behaviors
an application can implement for the user experience. This reduces
the causes for a disconnect to a more generic set.
+ Lots of work to pipe this through. DisconnectCause replaces the
code and message which were formerly passed around.

Bug: 17241433
Bug: 17329632
Change-Id: I9d337e478a8784bcc0ade02267c2df52cac9bf17

telecomm/java/android/telecom/ConnectionServiceAdapter.java

@@ -134,14 +134,13 @@ final class ConnectionServiceAdapter implements DeathRecipient {
      * Sets a call's state to disconnected.
      *
      * @param callId The unique ID of the call whose state is changing to disconnected.
-     * @param disconnectCause The reason for the disconnection, any of
-     *            {@link android.telephony.DisconnectCause}.
-     * @param disconnectMessage Optional call-service-provided message about the disconnect.
+     * @param disconnectCause The reason for the disconnection, as described by
+     *            {@link android.telecomm.DisconnectCause}.
      */
-    void setDisconnected(String callId, int disconnectCause, String disconnectMessage) {
+    void setDisconnected(String callId, DisconnectCause disconnectCause) {
         for (IConnectionServiceAdapter adapter : mAdapters) {
             try {
-                adapter.setDisconnected(callId, disconnectCause, disconnectMessage);
+                adapter.setDisconnected(callId, disconnectCause);
             } catch (RemoteException e) {
             }
         }