Include UseAndroid only for tests.

Because we need it only for tests.

CMakeLists.txt

@@ -61,14 +61,6 @@ find_package(Corrade REQUIRED Utility)
 
 include(CMakeDependentOption)
 
-# For experimental Gradle-less Android APK creation. Only with CMake > 3.7 that
-# has builtin Android support -- Gradle uses 3.6 so this will nicely work in
-# both cases.
-if(CORRADE_TARGET_ANDROID AND CMAKE_ANDROID_NDK)
-    list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/toolchains/modules/")
-    include(UseAndroid)
-endif()
-
 # If targeting iOS, Android, Emscripten or Windows RT, set explicit OpenGL ES
 # support
 if(NOT CORRADE_TARGET_IOS AND NOT CORRADE_TARGET_ANDROID AND NOT CORRADE_TARGET_EMSCRIPTEN AND NOT CORRADE_TARGET_WINDOWS_RT)
@@ -202,6 +194,14 @@ if(BUILD_TESTS)
         set(CORRADE_TESTSUITE_BUNDLE_IDENTIFIER_PREFIX "cz.mosra.magnum")
     endif()
     enable_testing()
+
+    # For experimental Gradle-less Android APK creation. Only with CMake > 3.7
+    # that has builtin Android support -- Gradle uses 3.6 so this will nicely
+    # work in both cases.
+    if(CORRADE_TARGET_ANDROID AND CMAKE_ANDROID_NDK)
+        list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/toolchains/modules/")
+        include(UseAndroid)
+    endif()
 endif()
 
 # OpenGLTester library, built by default only if GL tests are enabled