Use Apache license for newly added files

Rather than the usual Apache license, I accidentally pasted a BSD
license header in four new files added earlier today.

Bug: 133117690
Test: N/A
Merged-In: Ic28f54be269b614b154c32359689c0c6a49b2320
Change-Id: Ie3a90065a4d5f2b5db4fc60efac7b01d8546226a
(cherry picked from commit 5e5c8a31f88bc370ee3ba371b695fe6c1cb52b17)