Don't use linked mediastore uris in DownloadProvider operations.

When MediaProvider db gets recreated, all the media content ids
get renumbered. It's possible that when DownloadProvider is
trying to delete an entry, it is holding onto a invalid mediastore
uri. So, don't use linked mediastore uris in DownloadProvider
operations. Also, revoke any prior uri grants of media content from
DownloadStorageProvider.

Bug: 132087334
Test: manual
Test: atest DownloadProviderTests
Test: atest cts/tests/app/src/android/app/cts/DownloadManagerTest.java
Test: atest cts/tests/app/DownloadManagerLegacyTest/src/android/app/cts/DownloadManagerLegacyTest.java
Test: atest cts/tests/app/DownloadManagerApi28Test/src/android/app/cts/DownloadManagerApi28Test.java
Test: atest cts/hostsidetests/appsecurity/src/android/appsecurity/cts/AppSecurityTests.java
Change-Id: I4885f5a0ae0b3ab660426605a8a43b8c1d66a4c7