Merge pull request #8471 from nextcloud/useKoltin15

Update Kotlin

build.gradle

@@ -9,7 +9,7 @@ import org.gradle.internal.jvm.Jvm
 // its root folder, another one for the app module in subfolder of root.
 
 buildscript {
-    ext.kotlin_version = '1.4.32'
+    ext.kotlin_version = '1.5.0'
     repositories {
         google()
         maven {
@@ -384,7 +384,7 @@ dependencies {
     // fix conflict in dependencies; see http://g.co/androidstudio/app-test-app-conflict for details
     //androidTestImplementation "com.android.support:support-annotations:${supportLibraryVersion}"
     androidTestImplementation 'tools.fastlane:screengrab:2.0.0'
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
     androidTestImplementation('com.android.support.test.espresso:espresso-intents:3.0.2')
 
 //    jacocoAnt "org.jacoco:org.jacoco.ant:${jacocoVersion}"