Compatibility matrices: kernel req at each FCM version

* devices with Shipping FCM version
   legacy / O / O-MR1 use 3.18, 4.4, 4.9

* devices with Shipping FCM version P use 4.4 4.9

Bug: 72389707

Test: manual inspection on
$OUT/system/etc/vintf/compatibility_matrix.*.xml

Change-Id: I4f37325c0210f88e9e6d3e7136a82d50da3e93fe