feat: animated-QR transfer, Android reader, relative-locktime preservation, karen7 hermetic tests

android/build.gradle.kts

@@ -0,0 +1,7 @@
+// Top-level build file: plugin versions only. See the docs for the full
+// compatibility matrix (Chaquopy 17 requires AGP 7.3-9.2 and minSdk 24).
+plugins {
+    id("com.android.application") version "8.10.0" apply false
+    id("org.jetbrains.kotlin.android") version "2.0.21" apply false
+    id("com.chaquo.python") version "17.0.0" apply false
+}