Google Pixel 3: new device

Add support for the Google Pixel 3 based on Petr Hodina's original device packages, and @Drakulix 's recent work getting support into the sdm845 kernel.

Support status is similar to other SDM845 devices, however audio support is missing and battery status reporting may be inaccurate (since we don't support the additional fuel gauge chip on the device).

This depends on !5486 (merged) being updated and merged.

device/testing/device-google-blueline/APKBUILD

+# Reference: <https://postmarketos.org/devicepkg>
+# Maintainer: Victoria Brekenfeld <postmarketos@drakulix.de>
+# Co-Maintainer: Joel Selvaraj <joelselvaraj.oss@gmail.com>
+# Co-Maintainer: Caleb Connolly <caleb@postmarketos.org>
+
+pkgname=device-google-blueline
+pkgdesc="Google Pixel 3"
+pkgver=1
+pkgrel=0
+url="https://postmarketos.org"
+license="MIT"
+arch="aarch64"
+options="!check !archcheck"
+depends="
+	linux-postmarketos-qcom-sdm845
+	mkbootimg
+	firmware-google-blueline
+	firmware-google-blueline-dtbo
+	postmarketos-base
+	soc-qcom-sdm845
+	soc-qcom-sdm845-ucm
+	soc-qcom-sdm845-qbootctl
+	soc-qcom-sdm845-nonfree-firmware
+"
+makedepends="devicepkg-dev"
+source="
+	deviceinfo
+	modules-initfs
+"
+
+build() {
+	devicepkg_build $startdir $pkgname
+}
+
+package() {
+	devicepkg_package $startdir $pkgname
+}
+
+sha512sums="
+1a6c56470ccf94a51d235b011d0069ed028f781eb94863759113b62646138e3a8a34936536715eb908b5bea06c360567b0f217427fc4e5b34a617388072367ec  deviceinfo
+e92b431723994d0edc9d946d45746282d7ff25d13b799bada703ba13669de131a97f317ed0fecdedeefea7879a06bafe1df7e4a42f86c46e9e4f30309a928b15  modules-initfs
+"