Merge "Unhide isRttSupported in TelephonyManager"

api/current.txt

@@ -43074,6 +43074,7 @@ package android.telephony {
     method @RequiresPermission(anyOf={android.Manifest.permission.ACCESS_NETWORK_STATE, android.Manifest.permission.READ_PHONE_STATE}) public boolean isDataRoamingEnabled();
     method public boolean isHearingAidCompatibilitySupported();
     method public boolean isNetworkRoaming();
+    method public boolean isRttSupported();
     method public boolean isSmsCapable();
     method @Deprecated public boolean isTtyModeSupported();
     method public boolean isVoiceCapable();

api/test-current.txt

@@ -1477,7 +1477,6 @@ package android.telephony {
 
   public class TelephonyManager {
     method public int getCarrierIdListVersion();
-    method public boolean isRttSupported();
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void refreshUiccProfile();
     method public void setCarrierTestOverride(String, String, String, String, String, String, String);
     field public static final int UNKNOWN_CARRIER_ID_LIST_VERSION = -1; // 0xffffffff

telephony/java/android/telephony/TelephonyManager.java

@@ -7858,9 +7858,7 @@ public class TelephonyManager {
      * support for the feature and device firmware support.
      *
      * @return {@code true} if the device and carrier both support RTT, {@code false} otherwise.
-     * @hide
      */
-    @TestApi
     public boolean isRttSupported() {
         try {
             ITelephony telephony = getITelephony();