If one uses AndroidManifest.xml file in the project, which was created with older version (2017.3 and below) and has "android:icon="@drawable/app_icon" in it, building the project fails. It fails as it doesn't find where to look for icon because new icons system was introduced in 2018.1.0a5.

To reproduce:
1. Open attached project
2. Build
Expected result: The project builds successfully, or the error should clearly indicate what's wrong and how to fix it.
Actual result: Building player failed with errors
error: "CommandInvokationFailure: Failed to re-package resources.
D:\Android\Sdk\build-tools\27.0.1\aapt.exe package --auto-add-overlay -v -f -m -J "gen" -M "AndroidManifest.xml" -S "res" -I "D:/Android/Sdk\platforms\android-27\android.jar" -F bin/resources.ap_ "

Note: Deleting the android:icon="@drawable/app_icon" part from AndroidManifest.xml makes it to build correctly.
Note: In best case, this part should just upgrade when upgrading the project to a version which uses the new icons system. Otherwise, the error should be at least informative.

Reproduced on: 2018.1.0a5, 2018.1.0a6,
Does not reproduce on: 2017.3.0f1, 2018.1.0a4