Add title to SeekbarPreference content description.

Adding a title to contentDesciption of the seekbar.
The title is helpful to indicate which seekbar user is changing when
talkback is enabled.

Also move SeekBarPreference from root package to widget packge.

Change-Id: I793f41c4902e350b6bc6d62761362779cc3722a9
Fix: 35421942
Test: make RunSettingsRoboTests

res/xml/accessibility_autoclick_settings.xml

@@ -18,7 +18,7 @@
                   android:title="@string/accessibility_autoclick_preference_title">
 
 
-    <com.android.settings.SeekBarPreference
+    <com.android.settings.widget.SeekBarPreference
         android:key="autoclick_delay"
         android:title="@string/accessibility_autoclick_delay_preference_title"/>
 

res/xml/assist_gesture_settings.xml

@@ -29,7 +29,7 @@
         android:title="@string/assist_gesture_title"
         android:summary="@string/assist_gesture_summary" />
 
-    <com.android.settings.SeekBarPreference
+    <com.android.settings.widget.SeekBarPreference
         android:key="gesture_assist_sensitivity"
         android:title="@string/assist_gesture_sensitivity_title"
         android:defaultValue="2"

res/xml/night_display_settings.xml

@@ -43,7 +43,7 @@
                 android:key="night_display_activated"
                 android:title="@string/night_display_title" />
 
-        <com.android.settings.SeekBarPreference
+        <com.android.settings.widget.SeekBarPreference
             android:key="night_display_temperature"
             android:title="@string/night_display_temperature_title"/>
 

res/xml/tts_settings.xml

@@ -37,14 +37,14 @@
 
         <!-- The max value for seek bars here should be kept in sync
              with the max value specified in TextToSpeechSettings class. -->
-        <com.android.settings.SeekBarPreference
+        <com.android.settings.widget.SeekBarPreference
             android:key="tts_default_rate"
             android:title="@string/tts_default_rate_title"
             android:summary="@string/tts_default_rate_summary"
             android:defaultValue="50"
             android:max="600"/>
 
-        <com.android.settings.SeekBarPreference
+        <com.android.settings.widget.SeekBarPreference
             android:key="tts_default_pitch"
             android:title="@string/tts_default_pitch_title"
             android:summary="@string/tts_default_pitch_summary"

src/com/android/settings/accessibility/ToggleAutoclickPreferenceFragment.java

@@ -26,7 +26,7 @@ import android.widget.Switch;
 
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.settings.R;
-import com.android.settings.SeekBarPreference;
+import com.android.settings.widget.SeekBarPreference;
 import com.android.settings.widget.SwitchBar;
 
 

src/com/android/settings/display/NightDisplaySettings.java

@@ -28,7 +28,7 @@ import android.widget.TimePicker;
 import com.android.internal.app.NightDisplayController;
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.settings.R;
-import com.android.settings.SeekBarPreference;
+import com.android.settings.widget.SeekBarPreference;
 import com.android.settings.SettingsPreferenceFragment;
 
 import java.text.DateFormat;

src/com/android/settings/gestures/AssistGestureSensitivityPreferenceController.java

@@ -24,7 +24,7 @@ import android.provider.Settings;
 import android.support.v7.preference.Preference;
 import android.support.v7.preference.PreferenceScreen;
 
-import com.android.settings.SeekBarPreference;
+import com.android.settings.widget.SeekBarPreference;
 import com.android.settings.core.PreferenceController;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settingslib.core.lifecycle.Lifecycle;

src/com/android/settings/notification/VolumeSeekBarPreference.java

@@ -31,7 +31,7 @@ import android.widget.SeekBar;
 import android.widget.TextView;
 
 import com.android.settings.R;
-import com.android.settings.SeekBarPreference;
+import com.android.settings.widget.SeekBarPreference;
 
 import java.util.Objects;
 

src/com/android/settings/tts/TextToSpeechSettings.java

@@ -36,7 +36,7 @@ import java.util.Collections;
 import com.android.settings.applications.LayoutPreference;
 
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
-import com.android.settings.SeekBarPreference;
+import com.android.settings.widget.SeekBarPreference;
 import com.android.settings.R;
 import com.android.settings.SettingsActivity;
 import com.android.settings.SettingsPreferenceFragment;

src/com/android/settings/widget/SeekBarPreference.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.settings;
+package com.android.settings.widget;
 
 import android.content.Context;
 import android.content.res.TypedArray;
@@ -22,6 +22,7 @@ import android.os.Parcel;
 import android.os.Parcelable;
 import android.support.v4.content.res.TypedArrayUtils;
 import android.support.v7.preference.PreferenceViewHolder;
+import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.view.KeyEvent;
 import android.view.View;
@@ -89,6 +90,10 @@ public class SeekBarPreference extends RestrictedPreference
         mSeekBar.setMax(mMax);
         mSeekBar.setProgress(mProgress);
         mSeekBar.setEnabled(isEnabled());
+        final CharSequence title = getTitle();
+        if (!TextUtils.isEmpty(title)) {
+            mSeekBar.setContentDescription(title);
+        }
         if (mSeekBar instanceof DefaultIndicatorSeekBar) {
             ((DefaultIndicatorSeekBar) mSeekBar).setDefaultProgress(mDefaultProgress);
         }