Update TEST_MAPPING in drm/mediadrm/plugins

drm/mediadrm/plugins/TEST_MAPPING is now updated to
CtsMediaDrmFrameworkTestCases

Since this TEST_MAPPING is now running presubmit tests from
CtsMediaDrmFrameworkTestCases, there is no need to specify set
of tests using include-filter as all tests in the specified
test case are drm related.

Test: cd frameworks/av/drm/mediadrm/plugins
Test: atest :presubmit
Bug: 223194396

Change-Id: I27613c63be7b324dfabc56355f762ed093330f2a