[OutputSwitcher] Fix system route of "This phone" disappeared when broadcasting

This bug was introduced by ag/34855603. The original change wrongly updated the checking non LE headset.

Bug: 438676750
Test: atest AudioManagerRouteControllerTest / Manual
Flag: com.android.media.flags.enable_output_switcher_personal_audio_sharing

Change-Id: I54ac3b51f968b9aa606c1f6aae98659568c9a363