Remove redundant 'virtual' in bluetooth_test_android.h
Remove redundant 'virtual' in bluetooth_test_android.h

This is to fix error when compiling with clang.

BUG=552335
TBR=ortuno@chromium.org,scheib@chromium.org

Review URL: https://codereview.chromium.org/1407863008

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#358310}

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