Do not bind TextClassifierService if the packge doesn't install.

Currently, TCMS will try to bind TCS even the package doesn't install
for certain user. If there are a lot of API calls come, we may call
bindService() many times, this may cause system stability problem. We
received the system reboot problem before.

We already have preload TextClassifierService in ExtServices on primary
user but it's possible the TextClassifierService doesn't install on the
profile user or users unintall package. It's possible the package may
not be installed on non-primary user.

Users also can disable TextClassifierService from ui interface easily,
it's possible occur on both primary and non-primary users, system should
also not bind TextClassifierService in this case.

In this change, system will avoid trying to call bindService() if the
TCS deosn't install or disabled to minimize binder calls.

Bug: 188825683
Bug: 170014504
Test: atest CtsTextClassifierTestCases
Test: manual. Create work profile, turn on/off it and reboot to check
the status. Disable app from Settings and check the status.

Change-Id: Ifa2bccc0d2435712461067d650b52cb02a903c59