Make the Emacs icon ``adaptive''

* java/AndroidManifest.xml.in (EmacsApplication): Set icon to
@mipmap/emacs_icon.

* java/org/gnu/emacs/EmacsService.java (onStartCommand): Pick a
better name for the persistent notification channel.

* java/res/drawable/emacs_background.xml:

* java/res/drawable/emacs_foreground.xml:

* java/res/mipmap/emacs_icon.png:

* java/res/mipmap-v26/emacs_icon.xml: New files, comprising an
``adaptive icon'' required by some Android launchers.

1 files changed, 1 insertions, 1 deletions

diff --git a/java/AndroidManifest.xml.in b/java/AndroidManifest.xml.in
index b9cda401c9d..2cbcdbc3e5b 100644
--- a/java/AndroidManifest.xml.in
+++ b/java/AndroidManifest.xml.in
@@ -76,7 +76,7 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>. -->
 
   <application android:name="org.gnu.emacs.EmacsApplication"
                android:label="Emacs"
-               android:icon="@drawable/emacs"
+               android:icon="@mipmap/emacs_icon"
                android:hardwareAccelerated="true"
                android:supportsRtl="true"
                android:theme="@style/EmacsStyle"