android/build.gradle template: merge subprojects {} blocks together

[bartekpacia]

Seeing if subprojects {} can be merged.

See also:

• Change project.buildDir in standalone subprojects property #91030
• Refactor: use one subprojects property #77942

Pre-launch Checklist

• I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
• I read the [Tree Hygiene] wiki page, which explains my responsibilities.
• I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement].
• I signed the [CLA].
• I listed at least one issue that this PR fixes in the description above.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or this PR is [test-exempt].
• I followed the [breaking change policy] and added [Data Driven Fixes] where supported.
• All existing and new tests are passing.

[AbdeMohlbi]

@bartekpacia
If u could add this to the template to hit two in a row here

[bartekpacia]

@AbdeMohlbi Right now I'm pretty confused, because this commit did not cause this test to fail.

[AbdeMohlbi]

I see even if i don't quite understand how tests works in this kind things can u try to run the test localy or smth i dunno ?sorry if i kept u busy from ur work

[bartekpacia]

I tried, but the results were non-deterministic. Gonna try again soon.

[AbdeMohlbi]

believe me if i could help i would throw a hand but i'm not capable of yet but soon i will , stay safe mate