PixelExtended 5.4 changelog for begonia

Source side changes done by me:

• Added and redesigned lockscreen shortcuts
• Added EvolutionX's Launcher3
• Hide notifications when quickly expanding QS
• Imported some UI sounds from Samsung S21 FE
• Updated keypress sounds from OOS

Device:

• Added high brightness values back
• Disallow aux camera usage for Telegram X and Nekogram
• Enabled FUSE Passthrough
• Enabled LTE+ icon
• Fixed incall volume adjustment
• Fixed macro camera is not shown in Aperture camera
• Fixed MTK FM Radio
• Fixed slow charge issues for some users
• Increased number of system-background cpus
• Force enabled volte and vowifi for supported carriers
• Updated CarrierConfig from 12.5.15.0 RGGEUXM

Kernel:

• Added and improved driver to control MTK sched boosts from userspace
• Disabled some logging
• Enabled MTK sched enhancement
• Enabled ThinLTO
• Merged 4.14.303
• Misc optimization for smoothness and battery backup
• Some GPU optimizations
• Some sched improvements