Populate hidden API light greylist for AOSP

This patch adds the light greylist and vendor list source files from
the internal tree, intersected with the full list of private APIs
in AOSP. This is a prerequisite for enabling the blacklist.

The CL is not merged into internal master.

Test: N/A
Change-Id: I41442574fff6894cd1cb004abc5101210cfb86ba
Merged-In: I8757a66bf625388e6f6419714ef5bba7af5d93ea