John Wang c2cbc730fc Only decode EXT1 tag when it is available.
Normally ADN record is stored in two tags, EFADN_TAG and EFEXT1_TAG. But if the EFEXT1_TAG is not set in EF_PBR entry,
it shouldn't be decoded otherwise it causes NullPointerException in readAdnFileAndWait().

bug: 3376954
Change-Id: I744cf5cb8662c75be1e7c6219fa92c67bdda82f2
2011-02-14 17:44:13 -08:00
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