message: Add visibility default on android select
  According to docs, default kicks in only when nothing else matches
diff: @@ -115,6 +115,7 @@ cc_binary(
  "//tensorflow:android": [
  "-lEGL",
  "-lGLESv3",
  + "-fvisibility=hidden",
  ],
  "//tensorflow:windows": [],
  "//conditions:default": [
  @@ -139,6 +140,7 @@ cc_binary(
  "//tensorflow:android": [
  "-lEGL",
  "-lGLESv3",
  + "-fvisibility=hidden",
  ],
  "//tensorflow:windows": [],
  "//conditions:default": [
  