Prepare Android release artifacts and listing (#112)

Add Rust distribution auditing, pinned post-build AAB signing, complete offline third-party notices, an Android privacy policy and reviewable Play listing assets. Preserve the application ID and audit both ARM ABIs, native symbols, baseline profiles and R8 mapping.

Fix dialog focus ownership, navigation-triggered cleanup loops and stale authentication errors after first-run setup, with native and real-activity regressions.

Google Play publication is deferred by the user. Issue #112 remains open for production signing, Console declarations and actual Play install/update verification.

android/licenses/jna-LICENSE.txt

@@ -0,0 +1,26 @@
+SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later
+
+Java Native Access (JNA) is licensed under the LGPL, version 2.1
+or later, or (from version 4.0 onward) the Apache License,
+version 2.0.
+
+You can freely decide which license you want to apply to the project.
+
+You may obtain a copy of the LGPL License at:
+
+http://www.gnu.org/licenses/licenses.html
+
+A copy is also included in the downloadable source code package
+containing JNA, in file "LGPL2.1", under the same directory
+as this file.
+
+You may obtain a copy of the Apache License at:
+
+http://www.apache.org/licenses/
+
+A copy is also included in the downloadable source code package
+containing JNA, in file "AL2.0", under the same directory
+as this file.
+
+Commercial support may be available, please e-mail
+twall[at]users[dot]sf[dot]net.