Add system bottom inset to drawer layout

For apps running on and targeting V+, system bar insets are no longer
appliedi by default  to the content view. This results the drawer layout
overlapping with system bars.

Test: atest CtsSharesheetTestCases:android.sharesheet.cts.CtsNfcResolverDeviceTest#testNfcCustomizations:
Bug: 331730637

Change-Id: I71c97c294e1e5ed05472d8293e531c45cf394b71