add patch level warning settings

Author: inthewaves

res/values/strings_ext.xml

@@ -220,4 +220,5 @@ Duress PIN works the same way duress password does."</string>
     <string name="app_play_integrity_api_not_blocked">Not blocked</string>
     <string name="app_play_integrity_see_all_apps">Show apps that used the Play Integrity API</string>
 
+    <string name="patch_level_expiry_warning_disable_title">Disable patch level expiry warnings</string>
 </resources>

res/xml/more_security_privacy_settings.xml

@@ -231,6 +231,13 @@
         settings:keywords="@string/keywords_app_pinning"
         settings:controller="com.android.settings.security.ScreenPinningPreferenceController" />
 
+    <SwitchPreferenceCompat
+        android:order="281"
+        android:key="expiry_warning_disable"
+        android:title="@string/patch_level_expiry_warning_disable_title"
+        settings:controller="com.android.settings.security.ExpiryWarningDisablePreferenceController"
+        />
+
     <SwitchPreferenceCompat
         android:order="281"
         android:key="show_system_process_crash_notifs"

src/com/android/settings/security/ExpiryWarningDisablePreferenceController.java

@@ -0,0 +1,44 @@
+package com.android.settings.security;
+
+import android.content.Context;
+import android.ext.settings.ExtSettings;
+
+import com.android.settings.core.TogglePreferenceController;
+import com.android.settings.ext.ExtSettingControllerHelper;
+
+public class ExpiryWarningDisablePreferenceController extends TogglePreferenceController {
+    public ExpiryWarningDisablePreferenceController(Context context,
+            String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    @Override
+    public boolean isChecked() {
+        return ExtSettings.USER_DISABLE_PATCH_LEVEL_EXPIRY_WARNING.get(mContext);
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        return ExtSettings.USER_DISABLE_PATCH_LEVEL_EXPIRY_WARNING.put(mContext, isChecked);
+    }
+
+    @Override
+    public boolean isSliceable() {
+        return false;
+    }
+
+    @Override
+    public int getSliceHighlightMenuRes() {
+        // not needed since it's not sliceable
+        return NO_RES;
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (ExtSettings.DEVICE_DISABLED_PATCH_LEVEL_EXPIRY_WARNING.get()) {
+            return UNSUPPORTED_ON_DEVICE;
+        }
+
+        return ExtSettingControllerHelper.getGlobalSettingAvailability(mContext);
+    }
+}