Port to Android API 36

Port to Android API 36

* java/AndroidManifest.xml.in: Update targetSdkVersion to 36.

* java/INSTALL: Document revised compilation dependencies.

* java/org/gnu/emacs/EmacsActivity.java (interceptBackGesture):
New function.
(onCreate): Invoke the same to register back gesture callbacks
on Android 16 or better.

* java/org/gnu/emacs/EmacsWindow.java (onBackInvoked): New
function.

* src/keyboard.c (lispy_function_keys): Amend with new symbols
introduced in Android API 36.

(cherry picked from commit 231c4f20ea17a406519d5797e8ea1afdd0111a7c)