Update gradle 3.4.1 (android#408)

Author: XinyueZ

build.gradle

@@ -29,7 +29,7 @@ buildscript {
         espressoVersion = '3.1.1'
         fragmentVersion = '1.1.0-alpha08'
         glideVersion = '4.9.0'
-        gradleVersion = '3.4.0'
+        gradleVersion = '3.4.1'
         gsonVersion = '2.8.2'
         junitVersion = '4.12'
         kotlinVersion = '1.3.31'