Fix an issue that clicking on a smart action chip on keyguard ...

failed to launch app resolver when there are more than one app handlers.

What happened:
1. TextClassifier constructs an implicit intent to fulfill a task
like opening a link, making a phone call, etc.
2. TextClassifier calls resolveActivity against the implicit intent to
resolve the intent. The resolve component name will be used to create
an explicit intent. In this case, the intent is resolved to the
app resolver activity.
3. wouldLaunchResolverActivity in SysUI returns false for an explicit
intent with component name android/ResolverActivity.
4. SysUI does not trigger the "start the activity after the keyguard
is gone" logic because wouldLaunchResolverActivity returns false.
5. When user clicks on the action on keyguard, ResolveActivity.onStop
is triggered because it is shown (and thus moved to the background)
under the keyguard. So, finish() is called in onStop, and thus the bug.

IMHO, wouldLaunchResolverActivity should not return false
for an explicit intent with component name android/ResolverActivity.
But since we are late at this point, the safest option is to not setting
component name when the intent is resolved to package "android". Note that
this is what we are doing for P, so it should be pretty safe.

Test: 1. Install two browsers. Send myself a link. Tap on the Open Link
chip on keyguard. App resolver is shown.
2. atest frameworks/base/core/tests/coretests/src/android/view/textclassifier/

BUG: 129220155

Change-Id: I6d4d67c2233a2fec950887ea274825bf1cbc1ae2