[2/2] AndroidxSettings: Lockscreen blur enhancements

Based off 2 commits
Omnirom: https://gerrit.omnirom.org/#/c/5706/
Author: UtkarshGupta

Vanir: https://github.com/VanirAOSP/packages_apps_Settings/commit/a10505c1df1d0f86c4c60a294f79f38f6cfac762
Author: AlmightyMegadeth00