Use .bazelversion to install bazel.

RELNOTES=N/A
PiperOrigin-RevId: 653485737

.bazelrc

@@ -6,3 +6,13 @@ build --host_javacopt=-g
 # TODO(ronshapiro): explore how much work it would be to reenable this
 build --javacopt="-Xep:BetaApi:OFF"
 build --host_javacopt="-Xep:BetaApi:OFF"
+
+# Note: This flag is required to prevent actions from clashing with each when
+# reading/writing tmp files. Without this flag we get errors like:
+#
+#  Error: Cannot use file /tmp/hsperfdata_runner/12 because it is locked by
+#         another process
+#
+# This flag will be enabled by default in Bazel 7.0.0, but for now we enable it
+# manually. For more details: https://github.com/bazelbuild/bazel/issues/3236.
+build --incompatible_sandbox_hermetic_tmp

.bazelversion

@@ -0,0 +1 @@
+6.4.0

.github/workflows/ci.yml

@@ -13,9 +13,6 @@ env:
   USE_JAVA_VERSION: '11'
   # This is required by AGP 8.3+.
   USE_JAVA_VERSION_FOR_PLUGIN: '17'
-  # Our Bazel builds currently rely on 6.4.0. The version is set via
-  # baselisk by USE_BAZEL_VERSION: https://github.com/bazelbuild/bazelisk.
-  USE_BAZEL_VERSION: '6.4.0'
   # The default Maven 3.9.0 has a regression so we manually install 3.8.7.
   # https://issues.apache.org/jira/browse/MNG-7679
   USE_MAVEN_VERSION: '3.8.7'

.github/workflows/release.yml

@@ -12,9 +12,6 @@ env:
   USE_JAVA_VERSION: '11'
   # This is required by AGP 8.3+.
   USE_JAVA_VERSION_FOR_PLUGIN: '17'
-  # Our Bazel builds currently rely on 6.4.0. The version is set via
-  # baselisk by USE_BAZEL_VERSION: https://github.com/bazelbuild/bazelisk.
-  USE_BAZEL_VERSION: '6.4.0'
   DAGGER_RELEASE_VERSION: "${{ github.event.inputs.dagger_release_version }}"
   # The default Maven 3.9.0 has a regression so we manually install 3.8.7.
   # https://issues.apache.org/jira/browse/MNG-7679