Allow TTY mode for GSM Phones

TTY mode should not be restricted to CDMA phones as some GSM carriers
support it.
TTY support is enabled by overlaying the tty_enabled boolean property
in packages/apps/Phones/res/values/config.xml

Also corrected wrong comments on TTY methods.

Change-Id: I48dbc2be51c3dcdaedc1838b85134edc7012be3c

telephony/java/com/android/internal/telephony/CommandsInterface.java

@@ -1305,18 +1305,25 @@ public interface CommandsInterface {
     void setCdmaSubscription(int cdmaSubscriptionType, Message response);
 
     /**
-     *  Set the TTY mode for the CDMA phone
+     *  Set the TTY mode
      *
-     * @param enable is true to enable, false to disable
+     * @param ttyMode one of the following:
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_OFF}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_FULL}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_HCO}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_VCO}
      * @param response is callback message
      */
     void setTTYMode(int ttyMode, Message response);
 
     /**
-     *  Query the TTY mode for the CDMA phone
+     *  Query the TTY mode
      * (AsyncResult)response.obj).result is an int[] with element [0] set to
-     * 0 for disabled, 1 for enabled.
+     * tty mode:
-     *
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_OFF}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_FULL}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_HCO}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_VCO}
      * @param response is callback message
      */
     void queryTTYMode(Message response);

telephony/java/com/android/internal/telephony/Phone.java

@@ -1463,9 +1463,11 @@ public interface Phone {
     /**
      * setTTYMode
      * sets a TTY mode option.
-     *
+     * @param ttyMode is a one of the following:
-     * @param ttyMode is a boolean representing the state that you are
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_OFF}
-     *        requesting, true for enabled, false for disabled.
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_FULL}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_HCO}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_VCO}
      * @param onComplete a callback message when the action is completed
      */
     void setTTYMode(int ttyMode, Message onComplete);

telephony/java/com/android/internal/telephony/PhoneBase.java

@@ -697,13 +697,11 @@ public abstract class PhoneBase extends Handler implements Phone {
     }
 
     public void setTTYMode(int ttyMode, Message onComplete) {
-        // This function should be overridden by the class CDMAPhone. Not implemented in GSMPhone.
+        mCM.setTTYMode(ttyMode, onComplete);
-        logUnexpectedCdmaMethodCall("setTTYMode");
     }
 
     public void queryTTYMode(Message onComplete) {
-        // This function should be overridden by the class CDMAPhone. Not implemented in GSMPhone.
+        mCM.queryTTYMode(onComplete);
-        logUnexpectedCdmaMethodCall("queryTTYMode");
     }
 
     public void enableEnhancedVoicePrivacy(boolean enable, Message onComplete) {

telephony/java/com/android/internal/telephony/cdma/CDMAPhone.java

@@ -1142,20 +1142,6 @@ public class CDMAPhone extends PhoneBase {
         return this.mIccFileHandler;
     }
 
-    /**
-     * Set the TTY mode of the CDMAPhone
-     */
-    public void setTTYMode(int ttyMode, Message onComplete) {
-        this.mCM.setTTYMode(ttyMode, onComplete);
-    }
-
-    /**
-     * Queries the TTY mode of the CDMAPhone
-     */
-    public void queryTTYMode(Message onComplete) {
-        this.mCM.queryTTYMode(onComplete);
-    }
-
     /**
      * Activate or deactivate cell broadcast SMS.
      *

telephony/java/com/android/internal/telephony/test/SimulatedCommands.java

@@ -1402,23 +1402,28 @@ public final class SimulatedCommands extends BaseCommands
     }
 
     /**
-     *  Set the TTY mode for the CDMA phone
+     *  Set the TTY mode
      *
-     * @param enable is true to enable, false to disable
+     * @param ttyMode is one of the following:
-     * @param serviceClass is a sum of SERVICE_CLASS_*
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_OFF}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_FULL}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_HCO}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_VCO}
      * @param response is callback message
      */
     public void setTTYMode(int ttyMode, Message response) {
-        Log.w(LOG_TAG, "CDMA not implemented in SimulatedCommands");
+        Log.w(LOG_TAG, "Not implemented in SimulatedCommands");
         unimplemented(response);
     }
 
     /**
-     *  Query the TTY mode for the CDMA phone
+     *  Query the TTY mode
      * (AsyncResult)response.obj).result is an int[] with element [0] set to
-     * 0 for disabled, 1 for enabled.
+     * tty mode:
-     *
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_OFF}
-     * @param serviceClass is a sum of SERVICE_CLASS_*
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_FULL}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_HCO}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_VCO}
      * @param response is callback message
      */
     public void queryTTYMode(Message response) {