feat(mobile): optimized thumbnail widget (#21073)

* thumbnail widget

* use animation ticker, improvements

* use static thumbnail resolution for now

* fix android sample size

* free memory sooner

* formatting

* tweaks

* wait for disposal

* remove debug prints

* take two on animation

* fix

* remote constructor

* missed one

* unused imports

* unnecessary import

* formatting

mobile/android/app/src/main/kotlin/app/alextran/immich/images/ThumbnailsImpl.kt

@@ -221,8 +221,8 @@ class ThumbnailsImpl(context: Context) : ThumbnailApi {
     return 1 shl max(
       0, floor(
         min(
-          log2(fullWidth / (2.0 * reqWidth)),
-          log2(fullHeight / (2.0 * reqHeight)),
+          log2(fullWidth / reqWidth.toDouble()),
+          log2(fullHeight / reqHeight.toDouble()),
         )
       ).toInt()
     )