* configure.ac: Stop relaying --with-ndk-cxx-shared to the
nested invocation of configure.

* build-aux/ndk-build-helper-1.mk (SYSTEM_LIBRARIES):

* build-aux/ndk-build-helper-2.mk (SYSTEM_LIBRARIES): Insert all
of the C++ libraries available on Android.

* configure.ac: Call ndk_LATE and ndk_LATE_EARLY within if
statement at toplevel, averting needless calls to AC_PROG_CXX.

* cross/ndk-build/Makefile.in (NDK_BUILD_CXX_STL)
(NDK_BUILD_CXX_LDFLAGS):

* cross/ndk-build/ndk-build.mk.in (NDK_BUILD_CXX_STL)
(NDK_BUILD_CXX_LDFLAGS): New variables.

* cross/ndk-build/ndk-resolve.mk (NDK_SYSTEM_LIBRARIES):
Introduce several other C++ libraries sometimes present on
Android.
(NDK_SO_EXTRA_FLAGS_$(LOCAL_MODULE)): Insert NDK_BUILD_CXX_STL
when any of these new C++ libraries are requested.

* m4/ndk-build.m4: Completely rewrite C++ compiler and library
detection.

* java/org/gnu/emacs/EmacsNative.java (EmacsNative): Attempt to
load more libraries from static initializer.

* java/INSTALL: Remove obsolete information.

* java/org/gnu/emacs/EmacsDesktopNotification.java (display1):
Don't call setPriority until Jelly Bean.

* doc/lispref/os.texi (Desktop Notifications): Document that
`:timeout' is now implemented.

* java/org/gnu/emacs/EmacsDesktopNotification.java
(EmacsDesktopNotification): New field delay.
(display1): Set delay on Android 8.0 and up.

* lisp/erc/erc-desktop-notifications.el
(erc-notifications-notify): Call Android or Haiku notification
functions on those systems.

* lisp/gnus/gnus-notifications.el (gnus-notifications-action)
(gnus-notification-close): Remove dismissed notifications from
the notification to message map.
(gnus-notifications-notify): Call android-notifications-notify
if possible.

* src/androidselect.c (android_init_emacs_desktop_notification):
Update accordingly.
(android_notifications_notify_1): New argument TIMEOUT.
(Fandroid_notifications_notify): New argument QCtimeout.
(syms_of_androidselect) <QCtimeout>: New symbol.

* java/AndroidManifest.xml.in: Register CancellationReceiver.

* doc/lispref/os.texi (Desktop Notifications): Document support
for `:resident'.

* java/org/gnu/emacs/EmacsService.java (cancelNotification):

* src/android.c (android_init_emacs_service):

* src/android.h (struct android_emacs_service): New function.

* src/androidselect.c (android_notifications_notify_1)
(Fandroid_notifications_notify): New parameter QCresident; save
it within notification lists.
(android_notification_deleted, android_notification_action):
Adjust for changes to the format of notification lists and
cancel non-resident notifications when an action is selected.
(syms_of_androidselect): <QCresident>: New symbol.

* java/org/gnu/emacs/EmacsDesktopNotification.java (display1):
Don't specify FLAG_ONE_SHOT in cancel intents.

* doc/lispref/os.texi (Desktop Notifications): Document that
:on-cancel, :on-action and :actions are now supported on
Android.

* java/org/gnu/emacs/EmacsActivity.java (onNewIntent): New
function.

* java/org/gnu/emacs/EmacsDesktopNotification.java
(NOTIFICATION_ACTION, NOTIFICATION_TAG, NOTIFICATION_DISMISSED):
New constants.  <actions, titles>: New fields.
(insertActions): New function.
(display1, display): Insert actions on Jelly Bean and up, and
arrange to be notified when the notification is dismissed.
(CancellationReceiver): New class.

* java/org/gnu/emacs/EmacsNative.java (sendNotificationDeleted)
(sendNotificationAction): New functions.

* src/android.c (sendDndDrag, sendDndUri, sendDndText): Correct
return types.
(sendNotificationDeleted, sendNotificationAction)
(android_exception_check_5, android_exception_check_6): New
functions.

* src/android.h:

* src/androidgui.h (struct android_notification_event): New
structure.
(union android_event): New member for notification events.

* src/androidselect.c (android_init_emacs_desktop_notification):
Update JNI signatures.
(android_notifications_notify_1, Fandroid_notifications_notify):
New arguments ACTIONS, ACTION_CB and CANCEL_CB.  Convert and
record them as appropriate.
(android_notification_deleted, android_notification_action): New
functions.
(syms_of_androidselect): Prepare a hash table of outstanding
notifications.
<QCactions, QCon_action, QCon_cancel> New defsyms.

* src/androidterm.c (handle_one_android_event)
<ANDROID_NOTIFICATION_DELETED>
<ANDROID_NOTIFICATION_ACTION>: Dispatch event contents to
androidselect.c for processing.

* src/androidterm.h:

* src/androidvfs.c (java_string_class): Export.

* src/keyboard.c (kbd_buffer_get_event) <NOTIFICATION_EVENT>:
Call callback specified by the event.

* src/termhooks.h (enum event_kind) [HAVE_ANDROID]: New
enum NOTIFICATION_EVENT.

* doc/emacs/android.texi (Android Environment): Document new
permissions and delete recently introduced permissions from the
list for Android 5.1 and earlier.

* java/AndroidManifest.xml.in: Declare 124 new permissions to
enable invoking features they protect from code running inside
Emacs.