Correct Magnification shortcut title

Root Cause: Magnification has its own ShortcutPreference, but we did not
update correct title with getShortcutTitle()

Solution: Call setTitle(getShortcutTitle()) in initShortcutPreference()

Bug: 228752572
Test: manual test
Change-Id: I85b09a22032bad0a0c840590a98be88538a0499b
diff --git a/src/com/android/settings/accessibility/ToggleScreenMagnificationPreferenceFragment.java b/src/com/android/settings/accessibility/ToggleScreenMagnificationPreferenceFragment.java
index d9a02c0..a6aeb89 100644
--- a/src/com/android/settings/accessibility/ToggleScreenMagnificationPreferenceFragment.java
+++ b/src/com/android/settings/accessibility/ToggleScreenMagnificationPreferenceFragment.java
@@ -470,9 +470,7 @@
         mShortcutPreference.setKey(getShortcutPreferenceKey());
         mShortcutPreference.setSummary(getShortcutTypeSummary(getPrefContext()));
         mShortcutPreference.setOnClickCallback(this);
-
-        final CharSequence title = getString(R.string.accessibility_shortcut_title, mPackageName);
-        mShortcutPreference.setTitle(title);
+        mShortcutPreference.setTitle(getShortcutTitle());
 
         final PreferenceCategory generalCategory = findPreference(KEY_GENERAL_CATEGORY);
         generalCategory.addPreference(mShortcutPreference);