[macOS] change Invoke-Pester function (#2261)

* [macOS] change Invoke-Pester function

* added new logic

* try another approach.

* invoke-tests change

* added a little bunch of tests.

* remove import from browsers

* added source for all tests covered scripts.

* run all tests.

* added proper module import

* RunAll-Tests.ps1 changes.

* added shebang

* added new approach for tests.

* the first line should be shebang

* fixed nitpicks

images/macos/provision/core/android-toolsets.sh

@@ -1,5 +1,6 @@
 #!/bin/bash -e -o pipefail
 source ~/utils/utils.sh
+source ~/utils/invoke-tests.sh
 
 function filter_components_by_version {
     minimumVersion=$1
@@ -105,3 +106,5 @@ curl -L -o proguard5.tgz $PROGUARD_LOCATION
 tar xzf proguard5.tgz --strip 1 && rm -f proguard5.tgz
 cp ../proguard4/proguard-*.txt . # Copy the Proguard Android definitions from the previous version
 popd
+
+invoke_tests "Android"