Android fixes

[mhsmith]

• Update the test repository URL – closes tests: test/test_android.py::test_xbuild_files failing #2931

• Update to current Python versions, which allows us to remove a patch for the testbed.

[mhsmith]

Sorry, didn't mean to send you the review request yet.

[mhsmith]

OK, this is ready for review now. The previous failure was caused by updating to the newest Python 3.15 beta. This runs tests on a different emulator system image, so the cibuildwheel tests were now downloading two images, one for 3.13 and 3.14, and one for 3.15. On GitHub Actions test_expected_wheels fails on 3.15 like this:

> Task :app:maxVersionSetup
  dev35_aosp_atd_x86_64_Small_Phone needs to be recreated because it is invalid (AvdStatus = ERROR_IMAGE_MISSING)
  Failed to to retrieve system image at: /usr/local/lib/android/sdk/system-images/android-35/aosp_atd/x86_64 Retrying in 2 seconds
  Failed to to retrieve system image at: /usr/local/lib/android/sdk/system-images/android-35/aosp_atd/x86_64 Retrying in 4 seconds
...
  > Task :app:maxVersionSetup
  Failed to to retrieve system image at: /usr/local/lib/android/sdk/system-images/android-35/aosp_atd/x86_64 Retrying in 10 seconds
  
  > Task :app:maxVersionSetup FAILED
  
  FAILURE: Build failed with an exception.
  
  * What went wrong:
  Execution failed for task ':app:maxVersionSetup'.
  > A failure occurred while executing com.android.build.gradle.internal.tasks.ManagedDeviceInstrumentationTestSetupTask$ManagedDeviceSetupRunnable
     > java.util.concurrent.ExecutionException: java.lang.IllegalStateException: System image does not exist at /usr/local/lib/android/sdk/system-images/android-35/aosp_atd/x86_64

I can't reproduce this locally, so I guess it's caused by the runner not having enough disk space for both images. This change has been backported to Python 3.13 and 3.14, but it won't be released on those versions until August. So I've reverted to the previous Python 3.15 version for now, and we can update all 3 simultaneously once they're available.

[mayeut]

Thanks.
Let's postpone Android 3.15.0b3 for now then.