WHC Shell: keyboard-first Android terminal over SSH to local Termux

Vendored Termux terminal-emulator/renderer (Apache 2.0) with kitty keyboard
protocol, modifyOtherKeys and any-event mouse tracking; sshj client with
Ed25519 key login and TOFU host keys; Termux font/colors/cursor sync;
mouse selection, context menu, zoom and fullscreen shortcuts.

.gitignore

@@ -0,0 +1,9 @@
+.gradle/
+build/
+app/build/
+local.properties
+*.keystore
+*.jks
+keystore.properties
+.idea/
+*.iml