Aperture: Start making it REUSE compliant

TODO: Add licenses for app/libs/*

Test: pipx run reuse lint
Change-Id: Id66a572d9e11ed9da2c7a922c675c3176cc44c86
diff --git a/lens_launcher/proguard-rules.pro b/lens_launcher/proguard-rules.pro
index f1b4245..5c6b4dc 100644
--- a/lens_launcher/proguard-rules.pro
+++ b/lens_launcher/proguard-rules.pro
@@ -1,3 +1,6 @@
+# SPDX-FileCopyrightText: 2023 The LineageOS Project
+# SPDX-License-Identifier: Apache-2.0
+
 # Add project specific ProGuard rules here.
 # You can control the set of applied configuration files using the
 # proguardFiles setting in build.gradle.