Enable providing icons for Android desktop notifications

* doc/lispref/os.texi (Desktop Notifications)
<android-notifications-notify>: Mention the :icon parameter.

* java/org/gnu/emacs/EmacsDesktopNotification.java
(EmacsDesktopNotification) <icon>: New field.
(<init>): New argument ICON.  Set this.icon to its value.
(display1): Use provided icon and always supply a pending intent
to open Emacs once the notification is clicked.

* java/res/layout/sdk8_notifications_view.xml
(sdk8_notifications_title, sdk8_notifications_content): Set
foreground color to #000000.

* src/androidselect.c (android_init_emacs_desktop_notification):
Update signature of <init>.
(android_locate_icon): New function.
(android_notifications_notify_1): New arg ICON.
(Fandroid_notifications_notify): New parameter icon.
(syms_of_androidselect): <QCicon>: New symbol.

1 files changed, 2 insertions, 0 deletions

diff --git a/java/res/layout/sdk8_notifications_view.xml b/java/res/layout/sdk8_notifications_view.xml
index 2daa5beea86..0572f350cff 100644
--- a/java/res/layout/sdk8_notifications_view.xml
+++ b/java/res/layout/sdk8_notifications_view.xml
@@ -23,9 +23,11 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>. -->
               android:layout_height="wrap_content"
               android:padding="8dp">
   <TextView android:id="@+id/sdk8_notifications_title"
+            android:textColor="#000000"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"/>
   <TextView android:id="@+id/sdk8_notifications_content"
+            android:textColor="#000000"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"/>
 </LinearLayout>