[Android] Make exceptions when starting MinidumpUploadService non-fatal.

Sometimes we get "android.util.AndroidException: Can't connect to
activity manager; is the system running?". So starting the service
should be best-effort.

BUG=None
R=craigdh@chromium.org

Review URL: https://codereview.chromium.org/92723002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237626 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237626