[xaprepare] Provision 'platform-33_r02' (#8004)

Google released a `r2` of `platform-33` while we are still using `r1`.
Our CI machines come pre-loaded with `r2`, so this means we have to
provision `r1` on every run.

  * [Windows agent image][0]
  * [Mac agent image][1]

Update `xaprepare` to provision `platform-33_r02.zip`, not
`platform-33_r01.zip`.

Running `class-parse` against both versions of `android.jar` produces
an identical file, so there are no API changes in `r2`.

[0]: https://github.com/actions/runner-images/blob/f4bbf91a0801f0f6d4ca07879837ab142bb3c944/images/win/Windows2022-Readme.md#android
[1]: https://github.com/actions/runner-images/blob/f4bbf91a0801f0f6d4ca07879837ab142bb3c944/images/macos/macos-12-Readme.md#android

Author: jpobst

build-tools/xaprepare/xaprepare/ConfigAndData/Dependencies/AndroidToolchain.cs

@@ -72,7 +72,7 @@ public AndroidToolchain ()
 				new AndroidPlatformComponent ("platform-30_r01",   apiLevel: "30", pkgRevision: "1"),
 				new AndroidPlatformComponent ("platform-31_r01",   apiLevel: "31", pkgRevision: "1"),
 				new AndroidPlatformComponent ("platform-32_r01",   apiLevel: "32", pkgRevision: "1"),
-				new AndroidPlatformComponent ("platform-33_r01",   apiLevel: "33", pkgRevision: "1"),
+				new AndroidPlatformComponent ("platform-33_r02",   apiLevel: "33", pkgRevision: "2"),
 				new AndroidPlatformComponent ("platform-UpsideDownCake_r03",   apiLevel: "UpsideDownCake", pkgRevision: "3"),
 
 				new AndroidToolchainComponent ("sources-33_r01",