FIX: Handle image decoding failure in composer image optimization (#13555)

There are some hard limits in browser Canvas implementations, that will
throw a runtime exception when crossed. Since those limits are platform
dependent, the best we can do is catch it and back off from trying to
optimize a problematic file.

For example, a 60MB PNG can be processed fine by Chrome but Firefox will
fail trying to extract the ImageData from the CanvasRenderingContext2D
with NS_ERROR_FAILURE.

Also cleans up the media-optimization-utils and add post-resize size logs

public/javascripts/media-optimization-worker.js

@@ -81,6 +81,7 @@ async function optimize(imageData, fileName, width, height, settings) {
       ).data;
       width = target_dimensions.width;
       height = target_dimensions.height;
+      logIfDebug(`Worker post resizing file: ${maybeResized.byteLength}`);
     } catch (error) {
       console.error(`Resize failed: ${error}`);
       maybeResized = imageData;