Implement basic icon picker

icons/build.gradle.kts

@@ -53,6 +53,6 @@ dependencies {
     implementation(project(":search"))
     implementation(project(":applications"))
     implementation(project(":crashreporter"))
-    implementation(project(":customattrs"))
+    api(project(":customattrs"))
 
 }

icons/src/main/java/de/mm20/launcher2/icons/IconRepository.kt

@@ -175,15 +175,24 @@ class IconRepository(
 
         val defaultTransformedIcon = applyTransformations(rawIcon, defaultTransformations)
 
-        suggestions.add(CustomIconSuggestion(
-            defaultTransformedIcon,
-            null,
-        ))
+        suggestions.add(
+            CustomIconSuggestion(
+                defaultTransformedIcon,
+                null,
+            )
+        )
 
         if (rawIcon is StaticLauncherIcon && rawIcon.backgroundLayer is TransparentLayer) {
             val adaptifyOptions = listOf(
+                // Legacy icons that simply fill the entire canvas
                 AdaptifiedLegacyIcon(
-                    fgScale = 1.25f,
+                    fgScale = 1f,
+                    bgColor = 1
+                ),
+                // 48x48 with 5px padding used to be the default icon size for icons generated by
+                // the Android Studio asset generator. Upscale these icons to remove that padding.
+                AdaptifiedLegacyIcon(
+                    fgScale = 48f / 38f,
                     bgColor = 1
                 ),
                 AdaptifiedLegacyIcon(
@@ -197,7 +206,8 @@ class IconRepository(
             )
             suggestions.addAll(
                 adaptifyOptions.mapNotNull {
-                    val transformation = getTransformations(it)?.firstOrNull() ?: return@mapNotNull null
+                    val transformation =
+                        getTransformations(it)?.firstOrNull() ?: return@mapNotNull null
                     CustomIconSuggestion(
                         icon = transformation.transform(rawIcon),
                         data = it,
@@ -211,7 +221,10 @@ class IconRepository(
 
     }
 
-    private suspend fun applyTransformations(icon: LauncherIcon, transformations: List<LauncherIconTransformation>): LauncherIcon {
+    private suspend fun applyTransformations(
+        icon: LauncherIcon,
+        transformations: List<LauncherIconTransformation>
+    ): LauncherIcon {
         var icon = icon
         if (icon is StaticLauncherIcon) {
             for (transformation in transformations) {
@@ -221,6 +234,10 @@ class IconRepository(
         return icon
     }
 
+    fun setCustomIcon(searchable: Searchable, icon: CustomIcon?) {
+        customAttributesRepository.setCustomIcon(searchable, icon)
+    }
+
 }
 
 data class CustomIconSuggestion(