Change Impress remote client target SDK version.

This change should remove compatibility menu button for modern Android
versions.

See Android developers blog post for details:
http://android-developers.blogspot.com/2012/01/say-goodbye-to-menu-button.html

Change-Id: I9152fa06558eabd633ad0c19174f45edddde2ee9
Reviewed-on: https://gerrit.libreoffice.org/2719Reviewed-by: Thorsten Behrens <tbehrens@suse.com>
Tested-by: Thorsten Behrens <tbehrens@suse.com>

android/sdremote/AndroidManifest.xml

@@ -10,7 +10,7 @@
 
     <uses-sdk
         android:minSdkVersion="10"
-        android:targetSdkVersion="10" />
+        android:targetSdkVersion="14" />
 
     <application
         android:icon="@drawable/ic_launcher"