Update libass-android to 0.5.0-beta01 (#1752)

## Description
Updates `libass-android` to `0.5.0-beta01`. While this is a beta
release, from my testing it is very stable. It also fixes several
issues, including crashes, as well. So I want to merge into the develop
branch, but it can always been reverted if necessary.

### Related issues
Should fix these issues:
- #1554
- #1561
- #1678

### Testing
On emulator & nvidia shield

## Screenshots
N/A

## AI or LLM usage
None

gradle/libs.versions.toml

@@ -40,7 +40,7 @@ preferenceKtx = "1.2.1"
 tvprovider = "1.1.0"
 workRuntimeKtx = "2.11.2"
 paletteKtx = "1.0.0"
-assMedia = "0.4.0"
+assMedia = "0.5.0-beta01"
 kotlinxCoroutinesTest = "1.11.0"
 coreTesting = "2.2.0"
 openapi-generator = "7.23.0"