Force unbind service on binding died

When a service connection's binding dies, always force the unbinding of the service to ensure proper cleanup.

Bug: 473814675
Flag: EXEMPT BUGFIX
Test: Manual verification to ensure the service is unbound
when the app moves to the background
Test: atest CtsNfcHceMultiDeviceTestCases  -- --testparam
pn532_serial_path=/dev/ttyUSB0
Cherrypick-From: https://googleplex-android-review.googlesource.com/q/commit:44f9a3b107be2185f366e85ef0215606e3b57f16
Merged-In: I06eecd4f38e21e91e5f4827ed499bb18fd67b4fa
Change-Id: I06eecd4f38e21e91e5f4827ed499bb18fd67b4fa