Update iOS license headers (and more)

Summary: Add the affiliates bit that the linter is checking for.

Reviewed By: jknoxville

Differential Revision: D15164826

fbshipit-source-id: 500ffe89ec0c2fd3acfbc374408d16a337cecfa4

android/sample/debug.keystore.properties

@@ -1,3 +1,8 @@
+# Copyright (c) Facebook, Inc. and its affiliates.
+#
+# This source code is licensed under the MIT license found in the LICENSE file
+# in the root directory of this source tree.
+
 key.alias=androiddebugkey
 key.store.password=android
 key.alias.password=android