Added DispatchersModule.kt and CoroutineTestRule.kt for coroutine dispatchers injection

build.gradle

@@ -16,6 +16,7 @@ buildscript {
         timber_version = '4.7.1'
         predict4java_version = '1.3.1'
         junit_version = '4.13.2'
+        coroutines_test_version = '1.3.2'
         leak_canary_version = '2.5'
     }
     repositories {