generate third-party licenses at build and show them from settings

Add AboutLibraries, whose Android Gradle plugin collects the licence and
attribution of every dependency into a generated resource at build time,
and surface it under a new About section in Settings.

build.gradle.kts

@@ -4,4 +4,5 @@ plugins {
     alias(libs.plugins.roborazzi) apply false
     alias(libs.plugins.ksp) apply false
     alias(libs.plugins.ktlint) apply false
+    alias(libs.plugins.aboutLibraries) apply false
 }