It kinda is. But, no, it is not a security breach as long as user knows about the app. In other words, to access other application or to kill another application you will need these permission: android.permission.KILL_BACKGROUND_PROCESSES
, android.permission.GET_TASKS
. So, while installing the application user will receive a list of permission the app is requesting. User must review these and only then he/she should accept if he wishes to use that application.