Make our tests large heap to workaround memory leak

Only a workaround, but should unblock our team.

Test: tradefed.sh run commandAndExit WmTests --include-annotation android.platform.test.annotations.Presubmit --exclude-annotation androidx.test.filters.FlakyTest
Bug: 123984854
Change-Id: I184e488938550290670ebe93badcdcca49e2bd4b
1 file changed