Save user's option when clicking 'Change setting' in triple-tap warning dialog

Root Cause: Did not save user's option when clicking 'Change setting'.

Solution: user did click on "save" before that dialog showed up, so it is their intention to save.

Fix: 228405345
Test: manual test
Change-Id: I28e3cb372419ec3b4f27ee84051f58d37e7c5c46

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

@@ -268,6 +268,7 @@ public class MagnificationModePreferenceController extends BasePreferenceControl
         final TextView messageView = contentView.findViewById(R.id.message);
         // TODO(b/225682559): Need to remove performClick() after refactoring accessibility dialog.
         final View.OnClickListener linkListener = view -> {
+            updateCapabilitiesAndSummary(mModeCache);
             mLinkPreference.performClick();
             dialog.dismiss();
         };