Trivial: Make vertical white space after license header consistent

Vertical white space between license header and the actual code is not consistent
across files. It looks like majority of the files leaves a single blank line
after license header. So make it consistent except for those exceptional cases
where the actual code starts with a function or class definition.

Change-Id: If6679ab19dc2d7a9df93e076db3019abc1e5b86b
Cleanup unused log related code

Not all modules need log function,but there are abused imports
codes for log. Let us clean up them.

Closes-Bug: #1265962
Change-Id: Icd4dc6f9d60cd829e5cd352f00144adb82cf8306
Merge "Cleanup unused log related code"
Merge "Trivial: Make vertical white space after license header consistent"