Changing min sdk to 25

Change-Id: I0d28069967854357ca755bf25dec19d4979bdecf
diff --git a/gradle.properties b/gradle.properties
index b299cfe..e31f59e 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -4,7 +4,7 @@
 
 ANDROID_X_VERSION=1.0.0-beta01
 
-GRADLE_CLASS_PATH=com.android.tools.build:gradle:3.2.0-rc03
+GRADLE_CLASS_PATH=com.android.tools.build:gradle:3.3.0
 
 PROTOBUF_CLASS_PATH=com.google.protobuf:protobuf-gradle-plugin:0.8.6
 PROTOBUF_DEPENDENCY=com.google.protobuf.nano:protobuf-javanano:3.0.0-alpha-7