PixysOS 5.1.5

Gapps:
https://downloads.pixysos.com/raphael/twelve/PixysOS-v5.1.5-GAPPS-raphael-OFFICIAL-20220819-015657.zip 

* Source upstream (5.1.5)
* Added screen off FOD
* Added back saturated color mode
* Updated display, graphics & GPS blobs
* Switched to latest soviet star kernel (Reverted display overclock & pixel thermal hal commits)
* Misc fixes & improvements

Notes:
• Always make a NAND backup. Be safe.
• Based on OSS Vendor and Soviet Kernel
• Thanks to @mnsheref & sushil for testing.

By @AzureHelper
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