Fix preferences under Related category can not launch its own page in bluetooth device details page

Root Cause: KeyboardSettingsPreferenceController override
handlePreferenceTreeClick() without checking the preference key, it will lead to handle all preferences' click action.

Solution: Check the preference is the expected preference key

Bug: 264017256
Test: make RunSettingsRoboTests ROBOTEST_FILTER=KeyboardSettingsPreferenceControllerTest
Change-Id: Idcdadc323df5b758b4b21329227e2bb721b1c394

src/com/android/settings/inputmethod/KeyboardSettingsPreferenceController.java

@@ -50,6 +50,10 @@ public class KeyboardSettingsPreferenceController extends BasePreferenceControll
 
     @Override
     public boolean handlePreferenceTreeClick(Preference preference) {
+        if (!getPreferenceKey().equals(preference.getKey())) {
+            return false;
+        }
+
         final Intent intent = new Intent(Settings.ACTION_HARD_KEYBOARD_SETTINGS);
         intent.setClass(mContext, PhysicalKeyboardActivity.class);
         intent.putExtra(PhysicalKeyboardFragment.EXTRA_BT_ADDRESS, mCachedDevice.getAddress());