arm64: configs: disable ANDROID_LOW_MEMORY_KILLER

arm64: configs: disable ANDROID_LOW_MEMORY_KILLER

userspace low memory mechanism is recommended from Android-P, it
will use vmpressure event to detect low memory and handle it in
lmkd,the in-kernel low memory killer will be removed from 4.12.

Bug 200453907

Change-Id: I7d074b125c5728d708cc4148050e0d965da2e2c1
Signed-off-by: Xianhui Wang <xianhuiw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1851518
(cherry picked from commit 14bb529942abbb3630de6f48488f712a73d5a859)
Reviewed-on: https://git-master.nvidia.com/r/1927021
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>