Bump gradle from 4.0.1 to 4.0.2

Bumps gradle from 4.0.1 to 4.0.2.

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

build.gradle

@@ -21,7 +21,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.0.1'
+        classpath 'com.android.tools.build:gradle:4.0.2'
         classpath('com.hiya:jacoco-android:0.2')
         classpath 'gradle.plugin.com.github.spotbugs.snom:spotbugs-gradle-plugin:4.5.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"