Navigation rail in landscape

[tekstrand]

What

1. Adds a layout-land variant of the main activity layout that puts a NavigationRailView on the left edge
2. References the nav view as NavigationBarView in the activity and fragments, the superclass the rail and the bottom bar share
3. Keeps the bottom bar labels always visible via labelVisibilityMode
4. Swaps the five tab icons to local Material Symbols drawables

Why

1. Landscape spends horizontal space on navigation and keeps the short screen for content instead of losing a strip to a full width bottom bar.
2. Both widgets subclass NavigationBarView, so the same code drives either one and nothing else has to care which layout inflated.
3. The rail always shows labels, so the phone bar now matches instead of hiding them on the unselected tabs.
4. The final set has no Decodes icon because that tab merges into Monitor later, so it gets a new ic_notes until then.

Test

1. ./gradlew :app:testDebugUnitTest
2. ./gradlew :app:assembleDebug installed on Fire HD 10 and Pixel 7 profile emulators. Landscape shows the rail on the left, portrait shows the labeled bottom bar, and tab switching works in both.

Screenshots

Tablet

Phone

[punk-kaos]

This one looks great, I'm going to hold onto it for a short bit as I'm going to try and push out a 1.0 release this week. After that I'll start pulling in changes that target UI upgrades and such like we've been discussing.