Adding FEEDBACK_BRAILLE to AccessibilityServiceInfo.

1. The feedback type provided by braille devices differs from all
   already predefined types and this change defines braille
   feedback type. Braille does not fit in the already predefined
   categories.

bug:6998945

Change-Id: Ide6043bed03fdecd6d2ee45a08762f5bd07a2118

Author: sganov

api/current.txt

@@ -2066,6 +2066,7 @@ package android.accessibilityservice {
     field public static final int DEFAULT = 1; // 0x1
     field public static final int FEEDBACK_ALL_MASK = -1; // 0xffffffff
     field public static final int FEEDBACK_AUDIBLE = 4; // 0x4
+    field public static final int FEEDBACK_BRAILLE = 32; // 0x20
     field public static final int FEEDBACK_GENERIC = 16; // 0x10
     field public static final int FEEDBACK_HAPTIC = 2; // 0x2
     field public static final int FEEDBACK_SPOKEN = 1; // 0x1

core/java/android/accessibilityservice/AccessibilityServiceInfo.java

@@ -84,6 +84,11 @@ public class AccessibilityServiceInfo implements Parcelable {
      */
     public static final int FEEDBACK_GENERIC = 0x0000010;
 
+    /**
+     * Denotes braille feedback.
+     */
+    public static final int FEEDBACK_BRAILLE = 0x0000020;
+
     /**
      * Mask for all feedback types.
      *
@@ -92,6 +97,7 @@ public class AccessibilityServiceInfo implements Parcelable {
      * @see #FEEDBACK_AUDIBLE
      * @see #FEEDBACK_VISUAL
      * @see #FEEDBACK_GENERIC
+     * @see #FEEDBACK_BRAILLE
      */
     public static final int FEEDBACK_ALL_MASK = 0xFFFFFFFF;
 
@@ -186,6 +192,7 @@ public class AccessibilityServiceInfo implements Parcelable {
      * @see #FEEDBACK_HAPTIC
      * @see #FEEDBACK_SPOKEN
      * @see #FEEDBACK_VISUAL
+     * @see #FEEDBACK_BRAILLE
      */
     public int feedbackType;
 
@@ -591,6 +598,12 @@ public static String feedbackTypeToString(int feedbackType) {
                     }
                     builder.append("FEEDBACK_VISUAL");
                     break;
+                case FEEDBACK_BRAILLE:
+                    if (builder.length() > 1) {
+                        builder.append(", ");
+                    }
+                    builder.append("FEEDBACK_BRAILLE");
+                    break;
             }
         }
         builder.append("]");