Change IMPORTANCE_PERCEPTIBLE_DEPRECATED to IMPORTANCE_PERCEPTIBLE_PRE_26

Also make sure to return the legacy value from
RunningAppProcessInfo.importance.

Bug: 37636026

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.ActivityManagerTest#testGetRunningAppProcesses'
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.ActivityManagerTest#testGetMyMemoryState'
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: Ie04e4dfa40c28ea391ae5ce3c769c6f8ee70a43d
7 files changed