Add mock api url argument into msal pipeline (#2103)

Company PR: AzureAD/microsoft-authentication-library-common-for-android#2387

Author: Yuki-YuXin

azure-pipelines/pull-request-validation/pr-msal.yml

@@ -15,6 +15,7 @@ variables:
 - name: robolectricSdkVersion
   value: 33
 - group: MSIDLABVARS
+- group: devex-ciam-test
 
 trigger:
   branches:
@@ -67,7 +68,7 @@ jobs:
   - task: Gradle@2
     displayName: Run Unit tests
     inputs:
-      tasks: msal:testLocalDebugUnitTest -Plabtest -PlabSecret=$(LabVaultAppCert) -ProbolectricSdkVersion=${{variables.robolectricSdkVersion}}
+      tasks: msal:testLocalDebugUnitTest -Plabtest -PlabSecret=$(LabVaultAppCert) -ProbolectricSdkVersion=${{variables.robolectricSdkVersion}} -PmockApiUrl=$(MOCK_API_URL)
       javaHomeSelection: $(BuildParameters.javaHomeSelection)
       jdkVersion: 1.11
 - job: spotbugs