DO NOT MERGE - Update prebuild current SDK

Copied files from lmp-dev branch at #1319972
http://android-build/builds/git_lmp-dev-linux-sdk_x86_64-sdk/1319972

Followed the instruction given at : goto/updateprebuilts

Change-Id: I6c858037aed5026bb12d3a6ba4a9a4df588533d2
diff --git a/current/support/v7/mediarouter/res/values-pt/strings.xml b/current/support/v7/mediarouter/res/values-pt/strings.xml
index 1ba4054..31f2f27 100644
--- a/current/support/v7/mediarouter/res/values-pt/strings.xml
+++ b/current/support/v7/mediarouter/res/values-pt/strings.xml
@@ -18,8 +18,7 @@
     xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
     <string name="mr_system_route_name" msgid="5441529851481176817">"Sistema"</string>
     <string name="mr_user_route_category_name" msgid="7498112907524977311">"Dispositivos"</string>
-    <!-- no translation found for mr_media_route_button_content_description (8327680881775995150) -->
-    <skip />
+    <string name="mr_media_route_button_content_description" msgid="8327680881775995150">"Transmitir"</string>
     <string name="mr_media_route_chooser_title" msgid="7106830097177242655">"Conectar ao dispositivo"</string>
     <string name="mr_media_route_chooser_searching" msgid="7553005460920830010">"Procurando dispositivos…"</string>
     <string name="mr_media_route_controller_disconnect" msgid="109793632378378069">"Desconectar"</string>