Bump gradle from 3.1.4 to 3.2.0 (#1017)

Bumps gradle from 3.1.4 to 3.2.0.

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

build.gradle

@@ -7,7 +7,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.4'
+        classpath 'com.android.tools.build:gradle:3.2.0'
         classpath 'com.dicedmelon.gradle:jacoco-android:0.1.3'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files