Set SOURCE to app package name when starting QSB (if not set)

If QSB is started by SearchManager.startSearch(globalSearch=true)
from some app that doesn't set SOURCE, it will be set to the
package name of that app.

Bug: http://b/issue?id=2315234
Change-Id: Ic07a143b27b658dea8b081b973ac24349a18b9f1
1 file changed