Update kernel to builds 8019225

git log --first-parent -100 --oneline --no-decorate 884a951e92a9..99f05a0e5fc0:
99f05a0e5fc0 ANDROID: Kleaf: Fix build by exporting mixed-build-prefix
b7a492af2e1e ANDROID: Reland "Kbuild: Support KBUILD_MIXED_TREE in Makefile.modfinal"
3d42cc9e75a3 ANDROID: kbuild: add support for compiling external device trees
9fe4dc55985d ANDROID: kbuild: add Kconfig support for external modules
b9f648a67c32 ANDROID: GKI: fscrypt: add OEM data to struct fscrypt_operations
427449e7c7d4 Merge 5.15.9 into android13-5.15
f36d7e344195 ANDROID: Fix wrong pr_err type specifier in remove_memory_subsection
1592d4fa4971 ANDROID: GKI: update symbol list for usleep_range change
1dcc7190fe48 Merge 5.15.8 into android13-5.15
5f6a4664cbc4 ANDROID: GKI: update virtual device symbol list

Test: treehugger
Bug: 211708246
Change-Id: I7f20bad249db8f84634d9e9b1133378cfa4956c5