Added missing png's to demo splash screen project (was caused by global gitignore). (#36997)

diff --git a/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/.gitignore b/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/.gitignore
index ac4a906..6522afd 100644
--- a/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/.gitignore
+++ b/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/.gitignore

@@ -1,3 +1,6 @@
+# Overrides for this project
+!flutter_splash_screen.png
+
 # Miscellaneous
 *.class
 *.log

diff --git a/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/android/app/src/main/res/drawable-land-xxhdpi/flutter_splash_screen.png b/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/android/app/src/main/res/drawable-land-xxhdpi/flutter_splash_screen.png
new file mode 100644
index 0000000..ca0a37c
--- /dev/null
+++ b/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/android/app/src/main/res/drawable-land-xxhdpi/flutter_splash_screen.png
Binary files differ

diff --git a/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/android/app/src/main/res/drawable-xxhdpi/flutter_splash_screen.png b/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/android/app/src/main/res/drawable-xxhdpi/flutter_splash_screen.png
new file mode 100644
index 0000000..63ca9f7
--- /dev/null
+++ b/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/android/app/src/main/res/drawable-xxhdpi/flutter_splash_screen.png
Binary files differ

diff --git a/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/android/app/src/main/res/mipmap-land-xxhdpi/flutter_splash_screen.png b/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/android/app/src/main/res/mipmap-land-xxhdpi/flutter_splash_screen.png
new file mode 100644
index 0000000..ca0a37c
--- /dev/null
+++ b/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/android/app/src/main/res/mipmap-land-xxhdpi/flutter_splash_screen.png
Binary files differ

diff --git a/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/android/app/src/main/res/mipmap-xxhdpi/flutter_splash_screen.png b/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/android/app/src/main/res/mipmap-xxhdpi/flutter_splash_screen.png
new file mode 100644
index 0000000..63ca9f7
--- /dev/null
+++ b/dev/integration_tests/android_splash_screens/splash_screen_kitchen_sink/android/app/src/main/res/mipmap-xxhdpi/flutter_splash_screen.png
Binary files differ