Refactoring: renamed DeviceAdminDetails to DeviceAdminAdd.

So far that screen was "read only", but it'll soon include actions
to activate / de-activate a device admin, so it makes sense to rename
it (so it's more similar to phone's nomenclature).

Test: adb shell am start -e android.app.extra.DEVICE_ADMIN_PACKAGE_NAME -a com.android.car.settings/com.android.car.settings.enterprise.DeviceAdminAddActivity
Test: atest DeviceAdminAddHeaderPreferenceControllerTest DeviceAdminAddSupportPreferenceControllerTest DeviceAdminAddWarningPreferenceControllerTest

Bug: 188585303

Change-Id: Idd77628fe1b06da1b429914891423f24adb16607
17 files changed