Upgrade gerrit-rest-java-client to the latest httpclient-android commit

See

https://github.com/uwolfer/gerrit-rest-java-client/compare/a7f5d5c...dd4837b

Change-Id: Ice529fb165efbc945070bc229cbf9fff088ed94a

app/build.gradle

diff --git a/app/build.gradle b/app/build.gradle
index 722d4c6..f830bd3 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -23,7 +23,7 @@
 
 dependencies {
     testCompile 'junit:junit:4.12'
-    compile 'com.github.uwolfer:gerrit-rest-java-client:a7f5d5c'
+    compile 'com.github.uwolfer:gerrit-rest-java-client:dd4837b'
     compile 'com.google.guava:guava:19.0'
     compile 'com.google.code.gson:gson:2.6.2'
     compile 'com.android.support:appcompat-v7:23.1.1'