MediaRecorderTest uses EncoderCapabilities.getVideoEncoders().
WifiManagerTest uses WifiManager.getTxPackageCount().
Pass the 'hidden-api-checks=false' flag to temporarily exempt the two
CTS packages from the hidden api check. We eventually should fix the
hidden API usage completely or exempt the violating tests only.
Bug: 77436928
Test: atest CtsMediaTestCases
Test: atest CtsNetTestCases
Change-Id: I85efbb08c24b87079c0360fc3f9a2267462592f0