Bump gradle from 3.1.4 to 3.2.0

Bumps gradle from 3.1.4 to 3.2.0.

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

build.gradle

@@ -15,7 +15,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.4'
+        classpath 'com.android.tools.build:gradle:3.2.0'
         classpath 'org.codehaus.groovy:groovy-all:2.4.12' 
         classpath('com.dicedmelon.gradle:jacoco-android:0.1.3') { 
             exclude group: 'org.codehaus.groovy', module: 'groovy-all'