Remove the dependency on InputMethodSettings

InputMethodUtils.InputMethodSetting is a quite complicated inernal
class of InputMethodUtils and PhysicalKeyboardFragment's depending on
it just for getting/setting SHOW_IME_WITH_HARD_KEYBOARD is overkill.

With this CL, PhysicalKeyboardFragment just uses Secure Settings APIs
directly.

There should be no user-visible behavior change.

Bug: 77730201
Test: Manually verified as follows:
 1. Open system settings.
 2. Tap "System" -> "Languages & input" -> "Physical keyboard"
 3. Make sure "Show virtual keyboard" is unchecked
 4. Make sure the following command shows 0
      adb shell settings get secure show_ime_with_hard_keyboard
 5. Check "Show virtual keyboard"
 6. Make sure the following command shows 1
      adb shell settings get secure show_ime_with_hard_keyboard
 7. Run the following command
      adb shell settings put secure show_ime_with_hard_keyboard 0
 8. Make sure "Show virtual keyboard" is chenged to unchecked
Change-Id: I956da5dad27313d6edf141f2320bb0a7954fbbea

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

@@ -38,7 +38,6 @@ import android.support.v7.preference.PreferenceScreen;
 import android.text.TextUtils;
 import android.view.InputDevice;
 
-import com.android.internal.inputmethod.InputMethodUtils;
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.internal.util.Preconditions;
 import com.android.settings.R;
@@ -52,7 +51,6 @@ import com.android.settingslib.utils.ThreadUtils;
 import java.text.Collator;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Objects;
 
@@ -73,8 +71,6 @@ public final class PhysicalKeyboardFragment extends SettingsPreferenceFragment
     private PreferenceCategory mKeyboardAssistanceCategory;
     @NonNull
     private SwitchPreference mShowVirtualKeyboardSwitch;
-    @NonNull
-    private InputMethodUtils.InputMethodSettings mSettings;
 
     private Intent mIntentWaitingForResult;
 
@@ -83,13 +79,6 @@ public final class PhysicalKeyboardFragment extends SettingsPreferenceFragment
         Activity activity = Preconditions.checkNotNull(getActivity());
         addPreferencesFromResource(R.xml.physical_keyboard_settings);
         mIm = Preconditions.checkNotNull(activity.getSystemService(InputManager.class));
-        mSettings = new InputMethodUtils.InputMethodSettings(
-                activity.getResources(),
-                getContentResolver(),
-                new HashMap<>(),
-                new ArrayList<>(),
-                UserHandle.myUserId(),
-                false /* copyOnWrite */);
         mKeyboardAssistanceCategory = Preconditions.checkNotNull(
                 (PreferenceCategory) findPreference(KEYBOARD_ASSISTANCE_CATEGORY));
         mShowVirtualKeyboardSwitch = Preconditions.checkNotNull(
@@ -210,7 +199,8 @@ public final class PhysicalKeyboardFragment extends SettingsPreferenceFragment
     }
 
     private void updateShowVirtualKeyboardSwitch() {
-        mShowVirtualKeyboardSwitch.setChecked(mSettings.isShowImeWithHardKeyboardEnabled());
+        mShowVirtualKeyboardSwitch.setChecked(
+                Secure.getInt(getContentResolver(), Secure.SHOW_IME_WITH_HARD_KEYBOARD, 0) != 0);
     }
 
     private void toggleKeyboardShortcutsMenu() {
@@ -218,12 +208,10 @@ public final class PhysicalKeyboardFragment extends SettingsPreferenceFragment
     }
 
     private final OnPreferenceChangeListener mShowVirtualKeyboardSwitchPreferenceChangeListener =
-            new OnPreferenceChangeListener() {
+            (preference, newValue) -> {
-                @Override
+                Secure.putInt(getContentResolver(), Secure.SHOW_IME_WITH_HARD_KEYBOARD,
-                public boolean onPreferenceChange(Preference preference, Object newValue) {
+                        ((Boolean) newValue) ? 1 : 0);
-                    mSettings.setShowImeWithHardKeyboard((Boolean) newValue);
                 return true;
-                }
             };
 
     private final ContentObserver mContentObserver = new ContentObserver(new Handler(true)) {