Bump gradle from 3.6.2 to 3.6.3

Bumps gradle from 3.6.2 to 3.6.3.

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

build.gradle

@@ -20,7 +20,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.2'
+        classpath 'com.android.tools.build:gradle:3.6.3'
         classpath('com.dicedmelon.gradle:jacoco-android:0.1.4') {
             exclude group: 'org.codehaus.groovy', module: 'groovy-all'
         }