R106

This is a regular update, no major changes:
--Linux upstream v4.14.237
--Latest F2FS patches from f2fs-stable merged in
--Latest Caf tag 'LE.UM.4.4.2.r1-04400-SDX55' merged in
--Update dtc-aosp to 'DTC 1.6.0-Android-build'
--Update WLAN driver to '5.2.022.8D'
--Latest AnyKernel3 updates
--Continue to clean up OPlus codes