Fix the wrong IMPORTANCE_ values.

Bug: 36697597
Test: cts-tradefed run cts-dev --skip-device-info --skip-preconditions --skip-system-status-check com.android.compatibility.common.tradefed.targetprep.NetworkConnectivityChecker -a armeabi-v7a -l INFO -m CtsAppTestCases -t android.app.cts.AlertWindowsTests

Change-Id: I3327d4668470400e8b30faeebb77534eeb2583ed
4 files changed