Fix bad merge in nativeDecodeFileDescriptor in BitmapFactory.cpp

BitmapFactory.deocdeFileDescriptor works as-is on host Linux and host
Mac as they support F_DUPFD_CLOEXEC.

Test: ShadowNativeBitmapFactoryTest in Google3
Bug: 341805079
Change-Id: I00914606e6745681655fcad7090e7f49e9fffc05
1 file changed