main/postmarketos-ui-phosh: disable auto-brightness by default (MR 1348)

We should disable it by default and let the user to enable it
when they want it.

And currently it's causing problems where the backlight would
go very dark with it enabled on PinePhone.

Signed-off-by: Danct12 <danct12@disroot.org>

main/postmarketos-ui-phosh/000-gschema.override

@@ -17,4 +17,4 @@ user-agent='Mozilla/5.0 (postmarketOS device, like iPhone; X11; Linux x86_64) Ap
 
 [org.gnome.settings-daemon.plugins.power]
 sleep-inactive-ac-type='nothing'
-
+ambient-enabled=false

main/postmarketos-ui-phosh/APKBUILD

 # Maintainer: Bart Ribbers <bribbers@disroot.org>
 pkgname=postmarketos-ui-phosh
 pkgver=1
-pkgrel=17
+pkgrel=18
 pkgdesc="(Wayland) Mobile UI developed for the Librem 5 (works only with numeric passwords!)"
 url="https://puri.sm"
 arch="noarch !armhf"
@@ -50,7 +50,7 @@ qt_tweaks() {
 }
 
 sha512sums="c51a5cf93495069d71900dd1c6fbddfa3bdfb70dbab8141d1b115b6150975a12206c63517f18dc516e0366028b32e014b6d37a20e19ff73d5f0934c518d3ab39  60-lightdm-autologin.conf
-d487ad8171773cf60241a917466f3da1f05a380429719c738bf6832741afef5798476374f693f60bfbdb0f3d4d3ee8c22343dc143f23eb9f1a415847c14f052c  000-gschema.override
+2bc94b0c457a85cadac88e48685b95e9c9a6f8d9e611a7aaf3c4dcd5c0fc846f1e6eb31f21a7e28e35507333e4c1f14d87845f042f86f00418aaec3a90d343d0  000-gschema.override
 4113ef59267e88d205ef1e1aec0ed11ccf817a25c232f2006a538b56fb466fad5025ad445d109e367ca92ee98d9b25f1f9a1a4b9bae2cb80df12a3739d62d10a  osk.sh
 57793bb079c76ba3bdcfca7880aa887de11fe80e7a05557b78435e57feabab70fbaeedc42da3aec6f914c35bba8e8ee9918367516eb45ee247f63f694624f179  gtk-app-wayland.sh
 6e193eca3961a78d47b4656892eae34d019d9317a255a201f5ea61e3300caff04c526a27cd98d0edc072b36e3eaf3a1768f4cd27c5e2be8b19c167d535c820a6  qt-tweaks.sh"