Remove the dependency on bevy::android::ANDROID_APP inside
android_keystore.rs. Instead, solitaire_data owns a process-wide
OnceLock<JavaVM> initialised by a new pub fn init_android_jvm().
solitaire_app calls it from android_main before run() so JNI is
ready before any auth-token operation can execute.
- android_keystore: drop ANDROID_APP import; add ANDROID_JVM OnceLock
and init_android_jvm(vm_ptr: *mut c_void)
- solitaire_data/lib.rs: re-export init_android_jvm for android target
- auth_tokens.rs: update doc comment (Android backend is now complete)
- solitaire_app/lib.rs: call init_android_jvm from android_main
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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