ci: Fix Chrome failures on Mac VMs (#5509)

.github/workflows/build-and-test.yaml

@@ -125,6 +125,21 @@ jobs:
           # Install a launcher that can execute a shell script to launch this
           npm install karma-script-launcher --save-dev
 
+      # When "Chrome for Testing" is installed on Mac, it gets invoked instead
+      # of simply "Chrome".  This other copy of Chrome, however, doesn't seem
+      # to have basic codecs like AAC and H264 available, causing many of our
+      # test scenarios to fail.  Deleting "Chrome for Testing" fixes this.
+      - name: 'Delete "Chrome for Testing" on Mac'
+        if: matrix.os == 'macos-latest' && matrix.browser == 'Chrome'
+        run: sudo rm -rf /Applications/Google\ Chrome\ for\ Testing.app
+
+      # Some CI images (self-hosted or otherwise) don't have the minimum Java
+      # version necessary for the compiler (Java 11).
+      - uses: actions/setup-java@v3
+        with:
+          distribution: zulu
+          java-version: 11
+
       - name: Build Player
         run: python build/all.py