bump android gradle plugin and build tools version

app/build.gradle

@@ -17,7 +17,7 @@ android {
         targetCompatibility JavaVersion.VERSION_1_7
     }
     compileSdkVersion 27
-    buildToolsVersion "28.0.2"
+    buildToolsVersion '28.0.3'
 
     defaultConfig {
         applicationId "nodomain.freeyourgadget.gadgetbridge"

build.gradle

@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.0'
+        classpath 'com.android.tools.build:gradle:3.2.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files