added android client

android/THIRD_PARTY_NOTICES.md

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+# Third-Party Notices
+
+The Android distribution combines components under compatible open-source
+licenses. Preserve their notices and license texts in source and binary
+distributions.
+
+| Component | License |
+|---|---|
+| mpv/libmpv | GPL-2.0-or-later by default; verify the pinned build configuration |
+| LLVM libc++ shared runtime (Android NDK r29) | Apache-2.0 WITH LLVM-exception |
+| AndroidX and Jetpack Compose | Apache-2.0 |
+| Kotlin | Apache-2.0 |
+| JNA | Apache-2.0 or LGPL-2.1-or-later |
+| UniFFI | MPL-2.0 |
+| proton-stream shared Rust crates | MIT |
+
+This summary is not a replacement for dependency license files. Before a
+release, generate an inventory from the resolved Cargo and Gradle lock data,
+review it, and package the complete license texts in the application. A bundled
+libmpv release must also identify the exact upstream source revision, local
+patches, configuration flags, and reproducible build instructions, and make the
+corresponding source available as the GPL requires.