Let the launcher icon catch up with the mark v2 already drew everywhere else

TitleBar and PhoneShell have drawn >_ knocked out of a solid accent tile since
v2, and both say in a comment that the launcher icon draws the same thing so the
three cannot drift. The launcher was still v1: an outlined square in the accent.
The comments are true now.

On Android the tile is the background layer rather than a rounded rectangle in
the foreground, because the rounding a launcher applies is its mask. Drawing the
tile would put a second rounded shape inside the mask, clipped at the corners on
any device whose mask is not the one it was drawn for; leaving it to the mask
gets a squircle on one device and a circle on another for free. Windows has no
mask, so dodossh.ico still draws its own corners.

The monochrome layer keeps only the glyph. A themed icon drops the background,
which is where the tile now lives, and a layer filled to the edges to stand in
for it would tint to a featureless square.

The glyph is half the width of the safe zone, taken from the two headers rather
than invented -- both set >_ a little under half the tile across. It is also
markedly more legible small than the outline was: dark on accent at 16px is a
mark, where a sub-pixel hairline was a smudge.

src/DodoSSH.Client.Android/Resources/drawable/ic_launcher_monochrome.xml

@@ -4,9 +4,14 @@
   the wallpaper's colours. The system tints this by its alpha and discards the colour, so
   the geometry is the foreground's and white is only a way of saying "opaque here".
 
+  Note what that means for the filled design: the accent tile is the background layer, and a
+  themed icon drops the background entirely. So the shape that survives here is the glyph, not
+  the tile — which is the right way round anyway. Filling this layer to the edges to stand in
+  for the tile would tint to a featureless square with nothing of the mark left in it.
+
   Worth shipping rather than leaving out: a launcher with themed icons on and no monochrome
   layer to use falls back to the full-colour icon, so the one app on the home screen still
-  drawn in green is this one.
+  drawn in blue is this one.
 -->
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="108dp"
@@ -15,24 +20,18 @@
     android:viewportHeight="108">
 
   <path
-      android:pathData="M33,33 L75,33 L75,75 L33,75 Z"
+      android:pathData="M36.06,43.33 L49.91,53.57 L36.06,63.8"
       android:fillColor="#00000000"
       android:strokeColor="#FFFFFF"
-      android:strokeWidth="2.2" />
-
-  <path
-      android:pathData="M44.8,48.75 L51.9,54 L44.8,59.25"
-      android:fillColor="#00000000"
-      android:strokeColor="#FFFFFF"
-      android:strokeWidth="2.8"
+      android:strokeWidth="5.4"
       android:strokeLineCap="round"
       android:strokeLineJoin="round" />
 
   <path
-      android:pathData="M54,59.7 L63.2,59.7"
+      android:pathData="M54,64.68 L71.94,64.68"
       android:fillColor="#00000000"
       android:strokeColor="#FFFFFF"
-      android:strokeWidth="2.8"
+      android:strokeWidth="5.4"
       android:strokeLineCap="round" />
 
 </vector>