chore(android): gradle 8.7

[m1ga]

What's new:

• updated gradle tools to 8.7 (note: some of the files below are updated by gradle itself)
• updated gradle plugin to 8.5.2
• updated the gradle section in the readme a bit

Tested:

• kitchensink
• hyperloop examples
• SDK compilation
• two other apps (with existing modules)
• building and running a module

Gradle 8.7 release notes:

Welcome to Gradle 8.7!

Here are the highlights of this release:
 - Compiling and testing with Java 22
 - Cacheable Groovy script compilation
 - New methods in lazy collection properties

only tested it with Java 21 at the moment

I'll keep it as a draft for now to have some more testing. Gradle cache is always an issue if you switch back and forward, makes it difficult to see if everything is working 😄

[hansemannn]

@m1ga Something for 12.7.0?

[m1ga]

will do some more tests 👍 especially on Mac and windows, not tested those yet.