Revert Tests & Utils to `upstream-import`

* Reverted all of the test utils + test files back to their original
form as found in aosp/upstream-import branch at version 121.0.6103.2

* Added @SkipPresubmit tags back again on some tests, this is the only divergence
left. It will be removed once aosp/2910846 gets merged then we can change
`exclude-annotation` to `exclude-filter` in TEST_MAPPING.

Bug: 304217500
Test: atest NetHttpTests
Change-Id: Idf8b76078aaf99613fc23ad65f9d0c6410f0d4a1
21 files changed