Fix: samples not builded when compiled through Android Studio (#3051)

android/launcher-app/CMakeLists.txt

@@ -2,7 +2,7 @@
 # License: MIT
 
 # Set CMake minimum version
-cmake_minimum_required (VERSION 3.10.2)
+cmake_minimum_required (VERSION 3.15)
 
 # Set project name
 project (Urho3D-Launcher)
@@ -13,5 +13,7 @@ set (CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../../cmake/Modules)
 # Include UrhoCommon.cmake module after setting project name
 include (UrhoCommon)
 
+set(URHO3D_SAMPLES 1)
+
 add_subdirectory (${CMAKE_CURRENT_SOURCE_DIR}/../../Source/Tools/Urho3DPlayer Urho3DPlayer)
 add_subdirectory (${CMAKE_CURRENT_SOURCE_DIR}/../../Source/Samples Samples)