Bump Bazel version to 4.2.2

Updates build_test.sh to avoid an "Android SDK api level 30 was requested but it is not installed in the Android SDK" error in some environments.

This error only appears when ANDROID_HOME is set - otherwise Bazel ignores the Android SDK, since Closure Compiler doesn't use Android. The root cause is the android_sdk_repository ref in https://github.com/google/bazel-common/blame/master/workspace_defs.bzl which we don't own.

PiperOrigin-RevId: 424633128

.bazelversion

@@ -1 +1 @@
-2.2.0
+4.2.2

build_test.sh

@@ -16,6 +16,10 @@
 # Script that can be used by CI server for testing JsCompiler builds.
 set -e
 
+# Avoid a "Android SDK api level 30 was requested but it is not installed" error
+# that happens when pulling in https://github.com/google/bazel-common
+unset ANDROID_HOME
+
 bazel build :all
 
 # TODO: Run other tests needed for open source verification