- Fixes https://github.com/termux/termux-packages/issues/25027
- JDK 21 has been released for a year, so theoretically, all packages should be ready now, but it will be necessary to test each package's basic functionality with `openjdk-21` installed, to make sure that they are compatible.
- Now that https://github.com/termux/termux-packages/pull/25214 has been merged, it should be easier for termux-apt users whose `java` command is set to `openjdk-17`, to get it automatically updated to `openjdk-21` without necessarily having to uninstall `openjdk-17`.
This add-on requires careful review and testing, but this will not interfere with compiling packages.
Co-authored-by: agnostic-apollo <agnosticapollo@gmail.com>
%ci:no-build
* Bump SDK revision to 9123335
* Remove no longer used platforms;android-21
* Do not remove "unused parts" from SDK (which are actually used)
* Make it possible to use alternative JAVA_HOME via TERMUX_JAVA_HOME
