gioui v0.10.2's onCreateView sends the window handshake ack
(mainWindow.windows <- struct{}{}) unconditionally on the UI thread. On
activity re-attach (relaunch after task wipe, config-change recreation)
the only receiver (newWindow via Window.init) never re-runs, so the send
blocks the UI thread forever in onCreate: the activity never gets an
input channel and the app is a live-but-unresponsive black screen.
The fork at /home/gmp/gioui-v0.10.2 (branch android-reattach-ack) moves
the send into the first-window-creation branch. Same fix as the pad app.
fsnotify v1.4.x's inotify_poller uses the legacy epoll_wait(2) syscall,
which is blocked by seccomp on x86_64 Android emulators (SIGSYS crash on
launch). v1.8.0 uses blocking reads on the inotify fd instead.
Also drop the unused git.wow.st/gmp/jni dependency.
