Fix android tools version used to build MT

build/android/build.gradle

@@ -3,15 +3,15 @@ buildscript {
 		mavenCentral()
 	}
 	dependencies {
-		classpath "com.android.tools.build:gradle:1.5.0"
+		classpath "com.android.tools.build:gradle:3.1.3"
 	}
 }
 
 apply plugin: "com.android.application"
 
 android {
-	compileSdkVersion 25
-	buildToolsVersion "25.0.3"
+	compileSdkVersion 26
+	buildToolsVersion "26.0.3"
 
 	defaultConfig {
 		versionCode 19