Upgrade android gradle plugin to v3.3.0. Also upgraded plugins that would

otherwise generate warning message (dexcount, play-publisher).

app/build.gradle

@@ -1,7 +1,19 @@
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.getkeepsafe.dexcount:dexcount-gradle-plugin:0.8.5'
+    }
+}
+
+plugins {
+    id('com.github.triplet.play') version '2.0.0'
+}
+
 import org.apache.tools.ant.filters.ReplaceTokens
 
 apply plugin: "com.android.application"
-apply plugin: 'com.github.triplet.play'
 apply plugin: 'com.getkeepsafe.dexcount'
 
 repositories {
@@ -9,15 +21,6 @@ repositories {
     mavenCentral()
 }
 
-buildscript {
-    repositories {
-       jcenter()
-    }
-    dependencies {
-        classpath 'com.getkeepsafe.dexcount:dexcount-gradle-plugin:0.8.2'
-    }
-}
-
 def getMyVersionName() {
     def parsedManifestXml = (new XmlSlurper())
             .parse("${projectDir}/src/main/AndroidManifest.xml")
@@ -198,7 +201,7 @@ dependencies {
 
 play {
     serviceAccountEmail = '522080222319-compute@developer.gserviceaccount.com'
-    pk12File = file('../serviceaccount-c3d7d0f61387.p12')
+    serviceAccountCredentials = file('../serviceaccount-c3d7d0f61387.p12')
 }
 
 // about.html is templatized so that we can automatically insert

build.gradle

@@ -7,8 +7,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.0'
-        classpath "com.github.triplet.gradle:play-publisher:1.2.0"
+        classpath 'com.android.tools.build:gradle:3.3.0'
         // Exclude the version that the android plugin depends on.
         configurations.classpath.exclude group: "com.android.tools.external.lombok"
     }
@@ -38,7 +37,7 @@ subprojects {
 
 project.ext {
     compileSdkVersion = 26
-    buildToolsVersion = "27.0.3"
+    buildToolsVersion = "28.0.3"
     minSdkVersion = 14
     targetSdkVersion = 26