Suppress NewApi lint warnings in AudioRecordInput.java.

Corrects the warnings caught by an FYI bot here:
http://build.chromium.org/p/chromium.fyi/builders/Android%20Builder%20%28dbg%29/builds/31483/steps/compile/logs/stdio

TESTED=build with android_lint=1 passes
R=apiccion@chromium.org, frankf@chromium.org, tommi@chromium.org
TBR=tommi

Review URL: https://codereview.chromium.org/107423004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240852 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240852