Revert "Contact/event/task upload: use streams directly without extra byte[] array"

This reverts commit 3bde3758fc.
Version bump to 1.0.9.1

Reason: A server MAY reject a request that contains a message body but not a Content-Length
by responding with 411 (Length Required). (RFC 7230 3.3.3 Message Body Length)

app/build.gradle

@@ -17,8 +17,8 @@ android {
         minSdkVersion 14
         targetSdkVersion 23
 
-        versionCode 100
-        versionName "1.0.9"
+        versionCode 101
+        versionName "1.0.9.1"
 
         buildConfigField "long", "buildTime", System.currentTimeMillis() + "L"
     }