updated gradle configuration according to latest repos

android-example/app/build.gradle

@@ -31,7 +31,6 @@ android {
 
 dependencies {
     compile 'com.android.support:appcompat-v7:27.1.1'
-    compile 'com.android.support.constraint:constraint-layout:1.0.0-beta4'
     compile 'com.android.support:design:27.1.1'
     compile 'com.android.support:support-v4:27.1.1'
     compile 'com.michaelpardo:activeandroid:3.1.0-SNAPSHOT'

android-example/build.gradle

@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.2'
+        classpath 'com.android.tools.build:gradle:3.4.1'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }

android-example/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Fri Feb 08 16:23:04 CST 2019
+#Wed Jun 12 20:34:19 CST 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=http://services.gradle.org/distributions/gradle-4.10.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip