Flags
Turn SRCJAR into JAR and paste the launcher3 contents into the current Launcher3 flags.
Remove all aconfig flags
Launcher3 Flags
out\soong.intermediates\packages\apps\Launcher3\aconfig\com_android_launcher3_flags_lib\android_common\gen\com_android_launcher3_flags_lib.srcjar
SystemUI
out\soong.intermediates\frameworks\base\packages\SystemUI\aconfig\com_android_systemui_flags_lib\android_common\gen\com_android_systemui_flags_lib.srcjar
SystemUI Shared
out\soong.intermediates\frameworks\libs\systemui\aconfig\com_android_systemui_shared_flags_lib\android_common\gen\com_android_systemui_shared_flags_lib.srcjar
Windows.flags2
out\soong.intermediates\frameworks\base\com.android.window.flags.window-aconfig-java\android_common\gen\com.android.window.flags.window-aconfig-java.srcjar
Change from windows.flag to windows.flags2
WM Shell
out\soong.intermediates\frameworks\base\libs\WindowManager\Shell\aconfig\com_android_wm_shell_flags_lib\android_common\gen\com_android_wm_shell_flags_lib.srcjar