Unhide telecom APIs needed by Contacts

* Removed @SystemApi and @hide from some telecom classes
  and APIs
* Stopped using explicit @link's to ConnectionService, so
  that I didn't need to unhide ConnectionService
* Added @SystemApi to hidden methods inside classes that
  I removed @SystemApi from.
* Ran update-api. This picked up unrelated Math changes
  from b/11388705.

Unbundling

Bug: 18777272
Bug: 11388705
Change-Id: I218e0c3c0ae515d3deb2d3b67657db45a0bad999

telecomm/java/android/telecom/TelecomManager.java

@@ -106,7 +106,6 @@ public class TelecomManager {
      * {@link VideoProfile.VideoState#BIDIRECTIONAL},
      * {@link VideoProfile.VideoState#RX_ENABLED},
      * {@link VideoProfile.VideoState#TX_ENABLED}.
-     * @hide
      */
     public static final String EXTRA_START_CALL_WITH_VIDEO_STATE =
             "android.telecom.extra.START_CALL_WITH_VIDEO_STATE";
@@ -117,9 +116,7 @@ public class TelecomManager {
      * {@link PhoneAccountHandle} to use when making the call.
      * <p class="note">
      * Retrieve with {@link android.content.Intent#getParcelableExtra(String)}.
-     * @hide
      */
-    @SystemApi
     public static final String EXTRA_PHONE_ACCOUNT_HANDLE =
             "android.telecom.extra.PHONE_ACCOUNT_HANDLE";
 
@@ -139,10 +136,7 @@ public class TelecomManager {
      * {@link android.content.Intent#ACTION_DIAL} {@code Intent} containing a {@link Bundle}
      * which contains metadata about the call. This {@link Bundle} will be saved into
      * {@code Call.Details}.
-     *
-     * @hide
      */
-    @SystemApi
     public static final String EXTRA_OUTGOING_CALL_EXTRAS =
             "android.telecom.extra.OUTGOING_CALL_EXTRAS";
 
@@ -554,9 +548,7 @@ public class TelecomManager {
      *
      * @param account The {@link PhoneAccountHandle}.
      * @return The {@link PhoneAccount} object.
-     * @hide
      */
-    @SystemApi
     public PhoneAccount getPhoneAccount(PhoneAccountHandle account) {
         try {
             if (isServiceConnected()) {