Add toggle app icons shadow

- Closes : #4570

lawnchair/res/values/strings.xml

@@ -187,6 +187,8 @@
     <string name="auto_adaptive_icons_label">Auto-adaptive icons</string>
     <string name="auto_adaptive_icons_description">For all non-adaptive icons</string>
 
+    <string name="shadow_bg_icons_label">Enable shadow background icons</string>
+
     <string name="background_lightness_label">Background lightness</string>
     <string name="adaptive_icon_background_description">Use 100% background lightness for white</string>
 

lawnchair/src/app/lawnchair/preferences/PreferenceManager.kt

@@ -42,6 +42,7 @@ class PreferenceManager private constructor(private val context: Context) : Base
     val allowRotation = BoolPref("pref_allowRotation", false)
     val wrapAdaptiveIcons = BoolPref("prefs_wrapAdaptive", false, recreate)
     val transparentIconBackground = BoolPref("prefs_transparentIconBackground", false, recreate)
+    val shadowBGIcons = BoolPref("pref_shadowBGIcons", true, recreate)
     val addIconToHome = BoolPref("pref_add_icon_to_home", true)
     val hotseatColumns = IntPref("pref_hotseatColumns", 4, reloadGrid)
     val workspaceColumns = IntPref("pref_workspaceColumns", 4)

lawnchair/src/app/lawnchair/ui/preferences/destinations/GeneralPreferences.kt

@@ -156,6 +156,10 @@ fun GeneralPreferences() {
                 label = stringResource(id = R.string.auto_adaptive_icons_label),
                 description = stringResource(id = R.string.auto_adaptive_icons_description),
             )
+            SwitchPreference(
+                adapter = prefs.shadowBGIcons.getAdapter(),
+                label = stringResource(id = R.string.shadow_bg_icons_label),
+            )
 
             ExpandAndShrink(visible = wrapAdaptiveIcons.state.value) {
                 SliderPreference(