Hide several System APIs

Test: Treehugger
Bug: 151241308
Change-Id: Ie611320f4651b83e0ced6f5c8fede34a8a0a41c1
Merged-In: Ie611320f4651b83e0ced6f5c8fede34a8a0a41c1
(cherry picked from commit 1e154a345c6ad62f84547ae27c70c24d2cfa0dcb)
8 files changed