Fix headless package-check issue in soundtrigger

Change package/UID check to match against any user to avoid cases where
the client app is not installed in SYSTEM_USER (headless) to cause
package manager to fail to find the package name and throw a security
exception.

Bug: 290462753
Bug: 288949320
Test: Assistant in headless mode
Change-Id: I8c804314c197890059c9a5d6184a923ce075ce61