Update mainline prebuilts to build 7876847.

Taken from branch aosp-master.

CL prepared by prebuilts/runtime/mainline/update.py with the following
targets: platform

See prebuilts/runtime/mainline/README.md for update instructions.

Changes to mainline/platform/test-exports/ and mainline/platform/impl/
have been removed manually.

Test: Presubmits
Bug: 194395971
Change-Id: Icb2cc5afd536850a65ef717501dbbde9a5b08673
105 files changed