Also set the default keychain.

Author: jonsimantov

.github/workflows/integration_tests.yml

@@ -855,8 +855,9 @@ jobs:
           set-keychain-settings tmp-keychain
           unlock-keychain -p ${{ secrets.TEST_SECRET }} tmp-keychain
           EOF
-          # Change the keychain list to the temp keychain.
+          # Change the keychain list and default keychain to the temp keychain.
           security list-keychains -d user -s tmp-keychain
+          security default-keychain -s tmp-keychain
       - name: Restore google-services files
         if: ${{ contains(needs.check_and_prepare.outputs.matrix_os, matrix.build_os) }}
         shell: bash