Add anydpi icon, plus simplified splash screens.

{{ cookiecutter.format }}/app/src/main/res/drawable/splash_screen_background.xml

@@ -3,5 +3,5 @@
     <item android:drawable="@color/colorSplashScreenBackground"/>
     <item
         android:gravity="center"
-        android:drawable="@drawable/splash_image_box" />
+        android:drawable="@mipmap/splash" />
 </layer-list>

{{ cookiecutter.format }}/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/colorSplashScreenBackground"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>

{{ cookiecutter.format }}/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/colorSplashScreenBackground"/>
+    <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+</adaptive-icon>

{{ cookiecutter.format }}/briefcase.toml

@@ -19,59 +19,14 @@ icon.square.96 = "app/src/main/res/mipmap-xhdpi/ic_launcher.png"
 icon.square.144 = "app/src/main/res/mipmap-xxhdpi/ic_launcher.png"
 icon.square.192 = "app/src/main/res/mipmap-xxxhdpi/ic_launcher.png"
 
-# Square splash screen images
-#
-# At app launch, we try to fill the screen's width with a square image, along
-# with a background color of `splash_background_color`. There will be some
-# padding above/below the image when the phone is in portrait mode (or to the
-# left/right of the image when the phone is in landscape mode). When the app
-# starts, we remove the splash image.
-#
-# We use the "normal" series of images on devices whose smallest dimension
-# ("width") is less than 480 density-independent pixels, typically 320.
-# Denisty-independent pixels are a way to measure physical size of the screen,
-# e.g., a 5" phone. We use the "large" series of images for devices with at
-# least 480 density-independent pixels of width, but smaller than xlarge. We use
-# the "xlarge" series of images for devices at least 720 density-independent
-# pixels of width.
-#
-# Normal corresponds to a typical phone. Large corresponds to a large phone, or
-# phone-tablet hybrid (phablet). Xlarge corresponds to a large tablet.
-#
-# In addition to the normal/large/xlarge physical size distinction, we need to
-# choose images appropriate for the device's current DPI. Android defines a
-# variety of screen DPI buckets; we use mdpi (1x), hdpi (1.5x), xhdpi (2x),
-# xxhdpi (3x), and xxxhdpi (4x). The device will choose the best image to use
-# based on its actual DPI.
-#
-# The simplest way to create these images is to create the largest one at
-# 2880x2880, then scale down. Create images whose width and height are the
-# number in the splash image name (e.g., 320x320 for splash.normal.320).
-#
-# See also:
-#
-# For definitions of device sizes:
-# https://developer.android.com/guide/topics/large-screens/support-different-screen-sizes#TaskUseSizeQuali
-#
-# For examples of specific devices and their sizes & DPI:
-# https://material.io/blog/device-metrics
-#
-# For the relative frequency of normal vs. large vs. xlarge in real-world
-# devices: https://developer.android.com/about/dashboards/index.html
-splash.normal.320 = "app/src/main/res/drawable/launch.png"
-splash.normal.480 = "app/src/main/res/drawable-hdpi/launch.png"
-splash.normal.640 = "app/src/main/res/drawable-xhdpi/launch.png"
-splash.normal.960 = "app/src/main/res/drawable-xxhdpi/launch.png"
-splash.normal.1280 = "app/src/main/res/drawable-xxxhdpi/launch.png"
+icon.square.320 = "app/src/main/res/mipmap-mdpi/splash.png"
+icon.square.480 = "app/src/main/res/mipmap-hdpi/splash.png"
+icon.square.640 = "app/src/main/res/mipmap-xhdpi/splash.png"
+icon.square.960 = "app/src/main/res/mipmap-xxhdpi/splash.png"
+icon.square.1280 = "app/src/main/res/mipmap-xxxhdpi/splash.png"
 
-splash.large.480 = "app/src/main/res/drawable-sw480dp/launch.png"
-splash.large.720 = "app/src/main/res/drawable-sw480dp-hdpi/launch.png"
-splash.large.960 = "app/src/main/res/drawable-sw480dp-xhdpi/launch.png"
-splash.large.1440 = "app/src/main/res/drawable-sw480dp-xxhdpi/launch.png"
-splash.large.1920 = "app/src/main/res/drawable-sw480dp-xxxhdpi/launch.png"
-
-splash.xlarge.720 = "app/src/main/res/drawable-sw720dp/launch.png"
-splash.xlarge.1080 = "app/src/main/res/drawable-sw720dp-hdpi/launch.png"
-splash.xlarge.1440 = "app/src/main/res/drawable-sw720dp-xhdpi/launch.png"
-splash.xlarge.2160 = "app/src/main/res/drawable-sw720dp-xxhdpi/launch.png"
-splash.xlarge.2880 = "app/src/main/res/drawable-sw720dp-xxxhdpi/launch.png"
+icon.adaptive.108 = "app/src/main/res/mipmap-mdpi/ic_launcher_foreground.png"
+icon.adaptive.162 = "app/src/main/res/mipmap-hdpi/ic_launcher_foreground.png"
+icon.adaptive.216 = "app/src/main/res/mipmap-xhdpi/ic_launcher_foreground.png"
+icon.adaptive.324 = "app/src/main/res/mipmap-xxhdpi/ic_launcher_foreground.png"
+icon.adaptive.432 = "app/src/main/res/mipmap-xxxhdpi/ic_launcher_foreground.png"