Remove support for duplicate file entries

Bug: 8219321
Change-Id: Ibc56bea753917c38e1bb20df48aa45fdff39d364
Fix the documentation for Math/StrictMath ceil/floor.

Bug: https://code.google.com/p/android/issues/detail?id=44080
Change-Id: I426b723a7aa36a16aed7baf36fd907786799c91a