permissions: Whitelist ThemePicker permissions

E AndroidRuntime: *** FATAL EXCEPTION IN SYSTEM PROCESS: main
E AndroidRuntime: java.lang.IllegalStateException: Signature|privileged permissions not in privapp-permissions whitelist: {com.android.customization: android.permission.CHANGE_OVERLAY_PACKAGES, com.android.customization: android.permission.SET_WALLPAPER_COMPONENT, com.android.customization: android.permission.WRITE_SECURE_SETTINGS}

Change-Id: Ia16fa9c125f9e195dd43768b2c264cca68d9273b
Signed-off-by: Jackeagle <jackeagle102@gmail.com>
1 file changed