Update kernel to builds 7817849 am: fba1428a8e am: eb3898f6a2 am: 5e228a946e am: 50199a4285

Original change: https://android-review.googlesource.com/c/kernel/prebuilts/5.10/arm64/+/1853152

Change-Id: Idaf64c1f9207d5da261578b125ac4ddac72d0ff4