Speculatively revert DrMemory suppression for WebrtcAudioPrivateTest.GetAndSetWithMediaStream.

TBR=bruening@chromium.org

BUG=442969

Review URL: https://codereview.chromium.org/1472033002

Cr-Commit-Position: refs/heads/master@{#361269}

tools/valgrind/drmemory/suppressions_full.txt

@@ -1819,11 +1819,6 @@ name=bug_436131_c
 *!ash::test::ShelfViewTest_OverflowBubbleSize_Test::TestBody
 *!testing::internal::HandleExceptionsInMethodIfSupported<>
 
-UNADDRESSABLE ACCESS
-name=bug_442969
-*!testing::internal::CmpHelperNE<>
-*!extensions::WebrtcAudioPrivateTest_GetAndSetWithMediaStream_Test::RunTestOnMainThread
-
 UNINITIALIZED READ
 name=bug_455417
 *!std::char_traits<>::compare