Fix a couple of incorrect test names in SI Android FYI bot's filter file.

The existing entries were failing to actually disable those tests on the
bot, seemingly because they were missing "All/".  Example failure:
https://ci.chromium.org/p/chromium/builders/ci/Site%20Isolation%20Android/46774

Bug: 906256
Change-Id: Ic59ee49e16ac063bd2a25dff879a2bd47ff22ad5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2459571
Auto-Submit: Alex Moshchuk <alexmos@chromium.org>
Commit-Queue: Łukasz Anforowicz <lukasza@chromium.org>
Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
Cr-Commit-Position: refs/heads/master@{#815124}

testing/buildbot/filters/site_isolation_android.content_browsertests.filter

@@ -2,6 +2,6 @@
 -RenderFrameHostManagerTest.ForegroundNavigationIsNeverBackgroundedWithSpareProcess
 
 # https://crbug.com/906256
--BlockedSchemeNavigationBrowserTest.PDF_NavigationFromFrame_TopFrameHasBlockedScheme_Block/1
--BlockedSchemeNavigationBrowserTest.PDF_NavigationFromFrame_Block/1
+-All/BlockedSchemeNavigationBrowserTest.PDF_NavigationFromFrame_TopFrameHasBlockedScheme_Block*
+-All/BlockedSchemeNavigationBrowserTest.PDF_NavigationFromFrame_Block*