Update facebook screenshot lib to 0.8.0

- LEARNER-5799
- Comment Removed attributes from the screentshots gradle file.
- Move the screenshots png's to the new directory named "API_21_NO_GP_XHDPI_768x1280_armeabi-v7a_"
- Move extra png's(having issue to complete screenshoot test) to the new directory named "discovery_screenshots".
- Move the DiscoveryLaunchScreenshotTests(having issue to perform screenshot test) to the root directory.

Makefile

@@ -57,9 +57,9 @@ test:
 validate: quality test
 
 e2e :
-	@./gradlew verifyMode screenshotTests -PdisablePreDex
+	@./gradlew verifyProdDebuggableAndroidTestScreenshotTest -PdisablePreDex
 
 artifacts:
 	@./gradlew copyLintBuildArtifacts
 	@./gradlew copyUnitTestBuildArtifacts
-	@./gradlew recordMode pullScreenshots -PdisablePreDex
+	@./gradlew pullProdDebuggableAndroidTestScreenshots -PdisablePreDex

OpenEdXMobile/build.gradle

@@ -16,7 +16,7 @@ buildscript {
         //Included for NewRelic
         classpath "com.newrelic.agent.android:agent-gradle-plugin:5.4.1"
 
-        classpath 'com.facebook.testing.screenshot:plugin:0.6.0'
+        classpath 'com.facebook.testing.screenshot:plugin:0.8.0'
         classpath 'com.google.gms:google-services:4.0.1'
     }
 }
@@ -281,10 +281,12 @@ android {
         // test configuration
         testApplicationId 'org.edx.mobile.test'
 
-        if (project.gradle.startParameter.taskNames.contains("screenshotTests")) {
-            Map<String, String> map = new HashMap<String, String>();
-            map.put("package", "org.edx.mobile.test.screenshot");
-            setTestInstrumentationRunnerArguments map
+        for(commands in project.gradle.startParameter.taskNames) {
+            if (commands .contains("ScreenshotTest") ) {
+                Map<String, String> map = new HashMap<String, String>();
+                map.put("package", "org.edx.mobile.test.screenshot");
+                setTestInstrumentationRunnerArguments map
+            }
         }
 
         testInstrumentationRunner "org.edx.mobile.test.EdXTestRunner"
@@ -475,6 +477,6 @@ android.applicationVariants.all { variant ->
 }
 
 screenshots {
-    testApkTarget = 'packageProdDebuggableAndroidTest'
-    connectedAndroidTestTarget = 'connectedProdDebuggableAndroidTest'
+//    testApkTarget = 'packageProdDebuggableAndroidTest'
+//    connectedAndroidTestTarget = 'connectedProdDebuggableAndroidTest'
 }

OpenEdXMobile/src/androidTest/java/org/edx/mobile/test/screenshot/test/DiscoveryLaunchScreenshotTests.java → OpenEdXMobile/src/androidTest/java/org/edx/mobile/test/DiscoveryLaunchScreenshotTests.java

@@ -1,4 +1,4 @@
-package org.edx.mobile.test.screenshot.test;
+package org.edx.mobile.test;
 
 import org.edx.mobile.view.DiscoveryLaunchActivity;
 import org.edx.mobile.view.DiscoveryLaunchPresenter;