Wakeup and unlock screen before running the tests

arm64-v8a DocumentsUIGoogleTests
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com.google.android.documentsui.tests (5 Tests)
[1/5] com.android.documentsui.FileManagementUiTest#testCopyLargeAmountOfFiles: PASSED (01m12.254s)
[2/5] com.android.documentsui.FileManagementUiTest#testDeleteDocument: PASSED (5.681s)
[3/5] com.android.documentsui.FileManagementUiTest#testDeleteDocument_Cancel: PASSED (5.230s)
[4/5] com.android.documentsui.FileManagementUiTest#testKeyboard_CopyDocument: PASSED (47.445s)
[5/5] com.android.documentsui.FileManagementUiTest#testKeyboard_CutDocument: PASSED (46.873s)

Test: atest DocumentsUIGoogleTests

Bug: 172071543
Change-Id: I1175242e0dc1c5c7bbc63a39d7e4a400282dc91e