1.6.3

Change log

1. Reduce the transparent area before judging the grayscale icon to fix the grayscale icon judgment error in some cases
2. Fix the problem that the processed media's small icon is always black
3. Manually recycle some unused bitmaps instead of waiting for the system UI GC, which may be beneficial to performance, but not obvious
4. Always replace notification icons with a resolution less than 48 × 48
5. Fix the grayscale icon size limit calculation error, which was not converted according to the screen pixel density before