@hide Os.waitpid().

That method was added meant to be a replacement for the version
of waitpid() removed in http://r.android.com/565744
We're no longer planning to make waitpid() part of upcoming
APIs because it is not useful. Therefore, this CL hides the
replacement implementation.

Since no other API signature contains Int32Ref, this CL also
@hides that class.

Bug: 70985234
Test: Treehugger

(cherry picked from commit 535e92615a7492a12d2efdd3b1de4f0a683a39e4)

Change-Id: I2279063678b6d5c054d87e0908dacac1c2ce71ba
Merged-in: I2279063678b6d5c054d87e0908dacac1c2ce71ba
2 files changed