The current license check hook in the aosp tree requires the following regex:
^[#/\*]*
[#/\*]* ?Copyright( \([cC]\))? 20[-0-9]{2,7} The Android Open Source Project
[#/\*]* ?
[#/\*]* ?Licensed under the Apache License, Version 2.0 \(the 

... skipped ...

[#/\*]*$

This prevents the following license headers from being accepted (note leading spaces starting from the 2nd line):
/*
 * Copyright (c) 2016 The Android Open Source Project
 *
 ... skipped ...
 */

while this one is accepted:
/*
* Copyright (c) 2016 The Android Open Source Project
*
 ... skipped ...
*/

The regex should allow for a leading space/spaces.