Bazel: Optimize RBE execution

Activate option --remote_download_minimal to make remote build even more
faster. See this upstream issue for more details: [1].

[1] bazelbuild/bazel#6862

Release-Notes: skip
Change-Id: Ibcf1c95b38e2194444f32cec9eab95aa9ad82039

tools/remote-bazelrc

@@ -27,6 +27,7 @@
 # for a remote machine to execute them.
 build:remote_shared --jobs=200
 build:remote_shared --disk_cache=
+build:remote_shared --remote_download_minimal
 
 # Set several flags related to specifying the platform, toolchain and java
 # properties.