Styx August release for rosy

Device side:

 - updated post_boot script from LA.UM.9.6.2.r1-04800-89xx.0

 - fixed power profile mismatch error from logs

 - LMKD changes

 - performance optimizations and improvements

 - disabled iorapd

 - fixed GPU stuck at 320MHz in GPU intensive tasks

Kernel side:

 - Upstreamed to v4.9.279

 - added exFAT support from @arter97

 - upstreamed exFAT to torvalds/linux

 - mm backports and changes 

 - lz4 changes from upstream 

 - zram changes from upstream 

 - inlined binder to aosp/4.19

 - disabled IPA_WS wakelock 

 - ion changes

 - Enabled GCC graphite optimization

 - scheduler ricing and backports

 - vmalloc backports and performance from Linux 5.2 (fixes issue where ram management used to degrade after few days of uptime)

 - crypto backports

 - fixed some race conditions

 - enabled optimized inlining

 - switched to 300Hz tickrate 

 - performance improvements

 - merged LA.UM.9.6.2.r1-04800-89xx.0 in kernel, wlan and audio drivers