Move non-treble devices to split file_contexts

Bug: 38502071
Test: build and boot non-Treble Bullhead, run CTS tests below
Test: build and boot Treble Marlin, run CTS tests below
Test: cts-tradefed run singleCommand cts --skip-device-info \
    --skip-preconditions --skip-connectivity-check --abi arm64-v8a \
    --module CtsSecurityHostTestCases \
    -t android.security.cts.SELinuxHostTest#testAospFileContexts
Test: cts-tradefed run singleCommand cts --skip-device-info \
    --skip-preconditions --skip-connectivity-check --abi arm64-v8a \
    --module CtsSecurityHostTestCases \
    -t android.security.cts.SELinuxHostTest#testValidFileContexts
Change-Id: Ia3792e5e8c8d9ef7177d6e309a1e0df54bbf75a5
1 file changed