Remove unnecessary notify in BT preference

notifyHierarchyChanged() is used before when we have
connected/disconnect deivce in same list. So only use it in
DevicePickerFragment.java, not other normal fragments.

Also that call will rebuild whole preference list, which is heavy.

Bug: 119479725
Test: Manual
Change-Id: I06cf221588001b38634fec9f02dee8bc1e561ea8

src/com/android/settings/bluetooth/BluetoothDevicePreference.java

@@ -31,6 +31,7 @@ import android.util.Pair;
 import android.util.TypedValue;
 import android.widget.ImageView;
 
+import androidx.annotation.VisibleForTesting;
 import androidx.appcompat.app.AlertDialog;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceViewHolder;
@@ -58,6 +59,8 @@ public final class BluetoothDevicePreference extends GearPreference implements
     private AlertDialog mDisconnectDialog;
     private String contentDescription = null;
     private boolean mHideSecondTarget = false;
+    @VisibleForTesting
+    boolean mNeedNotifyHierarchyChanged = false;
     /* Talk-back descriptions for various BT icons */
     Resources mResources;
 
@@ -80,8 +83,8 @@ public final class BluetoothDevicePreference extends GearPreference implements
         onDeviceAttributesChanged();
     }
 
-    void rebind() {
-        notifyChanged();
+    public void setNeedNotifyHierarchyChanged(boolean needNotifyHierarchyChanged) {
+        mNeedNotifyHierarchyChanged = needNotifyHierarchyChanged;
     }
 
     @Override
@@ -144,7 +147,9 @@ public final class BluetoothDevicePreference extends GearPreference implements
         setVisible(mShowDevicesWithoutNames || mCachedDevice.hasHumanReadableName());
 
         // This could affect ordering, so notify that
-        notifyHierarchyChanged();
+        if (mNeedNotifyHierarchyChanged) {
+            notifyHierarchyChanged();
+        }
     }
 
     @Override