fix: non-app capability handling (#1039)

* fix: skip absolute_app_path for non-app

* update changelog

* tweak the order

CHANGELOG.md

@@ -3,6 +3,9 @@ Commit based release not is [release_notes.md](./release_notes.md)
 
 Release tags are https://github.com/appium/ruby_lib/releases .
 
+## not released
+- Fix non `app` capability behavior
+
 ## 15.2.1 - 2024-08-03
 - Fix client side timeout in the default http client
 - Bump appium_lib_core 9.2.1+ to apply the fix

lib/appium_lib/driver.rb

@@ -269,9 +269,9 @@ def set_app_path(opts)
 
       # return the path exists on the local
       app_path = Driver.get_cap(@core.caps, 'app')
-      return if !app_path.nil? && File.exist?(app_path)
+      return if app_path.nil?
+      return if File.exist?(app_path)
 
-      # The app file is not exact path
       @core.caps['app'] = self.class.absolute_app_path opts
     end