add copyright notices to some source files

Only empty files don't need copyright notices.

Change-Id: If1720d243bcd5bc1b5cee8b4a914ba0ca5b2f397
Removed copyright from files without code

Due to a recent change in policy files without code shouldn't contain
any license or comments and musy be left empty.

Closes Bug: #1262424

Change-Id: Id0dd8f8f7e38145d912fb39a750aade2fd5b2df8
Merge "Removed copyright from files without code"
Merge "add copyright notices to some source files"