Expose emulator images for APIs 29+ in Bazel

### Description
https://github.com/android/android-test/blob/master/tools/android/emulated_devices/macro/image_info.bzl currently exposes only images up to API 28. API 28 is Android 9 and was released three years ago. It would be nice to have this updated for more recent API levels.

Device templates also stopped with the Pixel 3 family in https://github.com/android/android-test/tree/master/tools/android/emulated_devices. Having more recent ones is less useful, but would still be a nice touch.

### Steps to Reproduce
Try to use e.g. `@android_test_support//tools/android/emulated_devices/generic_phone:android_29_x86_qemu2`

### Expected Results
It should work.

### Actual Results
```
no such target '@android_test_support//tools/android/emulated_devices/generic_phone:android_29_x86_qemu2': target 'android_29_x86_qemu2' not declared in package 'tools/android/emulated_devices/generic_phone' (did you mean 'android_19_x86_qemu2'?)
```

### AndroidX Test and Android OS Versions
1.4.0

### Link to a public git repo demonstrating the problem:

Start with tools/android/emulated_devices/macro/image_info.bzl and the tools/android/emulated_devices/generic_phone package. Check how existing API 28 image targets are defined, then add the requested API 29+ targets and verify that @android_test_support//tools/android/emulated_devices/generic_phone:android_29_x86_qemu2 resolves in Bazel.

Scritto dal modello di indicizzazione a partire dal testo della issue.