Add <kernel> entry to framework compat mat

3.18, 4.4 and 4.9 are the supported kernels in O.

Test: builds
Test: adb shell vintf (RuntimeInfo is compatible with
 framework compat mat)

Bug: 38324908
Change-Id: I8b2c98e8168af651215a309c8b0b93d3c342f97d
1 file changed