VmTerminalApp: Merge with LinuxInstaller

This CL includes following changes:
- Move linux_vm_setup to VmTerminalApp
- Remove LinuxInstaller and clean up relevant codes

Bug: 369746567
Test: manually
Change-Id: I2c4e80cb577b0cd568039b92265cca32bcababde
diff --git a/private/vmlauncher_app.te b/private/vmlauncher_app.te
index c76c117..3244e65 100644
--- a/private/vmlauncher_app.te
+++ b/private/vmlauncher_app.te
@@ -24,3 +24,6 @@
   # Allow other processes to access the pts.
   allow vmlauncher_app vmlauncher_app_devpts:chr_file setattr;
 ')
+
+# TODO(b/372664601): Remove this when we don't need linux_vm_setup
+set_prop(vmlauncher_app, debug_prop);