Never restore emulated external target 0

If the guest isn't using an external txture, we
risk binding texture2d target to texture 0
on "restoration."

Test: CtsUiRenderingTestCases: 192 pass 4 fail, or
at least should not NX

bug: 37640508
Change-Id: I0061d9bc6a05a124357cc97a5682006170beefce
1 file changed
tree: cfd97ab27afde9154da9f442b85a37c4a564d0a4
  1. host/
  2. shared/
  3. system/
  4. tests/
  5. Android.mk
  6. common.mk
  7. README