use robolectric for android tests

owncloudComLibrary/build.gradle

@@ -16,6 +16,7 @@ dependencies {
     kapt "com.squareup.moshi:moshi-kotlin-codegen:$moshiVersion"
 
     testImplementation "junit:junit:4.13.1"
+    testImplementation 'org.robolectric:robolectric:4.3.1'
 }
 
 android {
@@ -43,4 +44,10 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+
+    testOptions {
+        unitTests {
+            includeAndroidResources = true
+        }
+    }
 }

owncloudComLibrary/src/test/java/com/owncloud/android/lib/GetRemoteStatusOperationTest.kt

@@ -1,6 +1,7 @@
 package com.owncloud.android.lib
 
 import android.net.Uri
+import android.os.Build
 import com.owncloud.android.lib.resources.status.GetRemoteStatusOperation
 import com.owncloud.android.lib.resources.status.HttpScheme.HTTPS_PREFIX
 import com.owncloud.android.lib.resources.status.HttpScheme.HTTP_PREFIX
@@ -8,7 +9,12 @@ import org.junit.Assert.assertEquals
 import org.junit.Assert.assertFalse
 import org.junit.Assert.assertTrue
 import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
 
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [Build.VERSION_CODES.O_MR1])
 class GetRemoteStatusOperationTest {
 
     @Test