DO NOT MERGE

For bug 4422428
Squashed commit of the following:

commit ae2e13783db2284f40d3891e70e152dab941edfc
Author: Gloria Wang <gwang@google.com>
Date:   Fri May 13 11:43:11 2011 -0700

    Add one more DRM error code. For bug 4422428.

    Change-Id: I4e333f474c96c0e0f162dde4013ad32b336bebd6

commit 0f88249d0cb5221f622cf1d1ac3cdccefb8f58a2
Author: Gloria Wang <gwang@google.com>
Date:   Fri Apr 29 10:44:46 2011 -0700

    Add DRM errors in the DRM frameworks to MediaErrors also.
    For bug 4350156.

    Change-Id: Ib5711ec642178a49203a448b7f5114e675d49394

Change-Id: Ia02de462159400eef8c015d28531bf1dd6796a18