Add flank/fladle to run UI tests

app/build.gradle

@@ -4,6 +4,7 @@ apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-kapt'
 apply plugin: 'jacoco'
 apply plugin: 'com.google.firebase.crashlytics'
+apply plugin: "com.osacky.fladle"
 
 def keystoreProperties = new Properties()
 try {
@@ -163,3 +164,16 @@ task jacocoTestReport(type: JacocoReport, dependsOn: ['testDebugUnitTest']) {
             'outputs/code-coverage/connected/*coverage.ec'
     ]))
 }
+
+fladle {
+    variant = 'playDebug'
+    useOrchestrator = true
+    environmentVariables = [
+            "clearPackageData": "true"
+    ]
+    testTimeout = "7m"
+    devices = [
+            [ "model": "NexusLowRes", "version": "30" ]
+    ]
+    projectId = 'simplemarkdown'
+}

build.gradle

@@ -12,6 +12,7 @@ buildscript {
         classpath 'com.google.gms:google-services:4.3.5'
         classpath 'com.google.firebase:firebase-crashlytics-gradle:2.5.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath "com.osacky.flank.gradle:fladle:0.14.1"
     }
 }