Update Daydream View headset string

Updates the string used to set the paired viewer to Daydream View during
VR tests. It was getting set to this version anytime an NFC scan
occurred, causing image diff tests to fail depending on which subset of
tests were run due to slightly different render sizes being reported by
VrCore.

TBR=billorr@chromium.org

Bug: 904012
Change-Id: I4ce031ffc0a5fba3abbe59a5d33dff1e5a416885
Reviewed-on: https://chromium-review.googlesource.com/c/1338224Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608477}

chrome/android/shared_preference_files/test/vr_ddview_skipdon_setupcomplete.json

@@ -6,7 +6,7 @@
     "set": {
       "VrSkipDon": true,
       "DaydreamSetupComplete": true,
-      "VrDeviceParams": "CgxHb29nbGUsIEluYy4SDURheWRyZWFtIFZpZXcdCfkgPSUB3oI9KhAAAFxCAABcQgAAXEIAAFxCNd9PDT06CLgexT7Zzhc_WABgAJqRYBoIARIKDQAAAAAV9P3UPBIKDQAAAAAV9P3UvA",
+      "VrDeviceParams": "CgxHb29nbGUsIEluYy4SDURheWRyZWFtIFZpZXcdCfkgPSUB3oI9KhAAAExCAAA0QgAAMEIAAFRCNd9PDT06CLgexT7Zzhc_WABgAJqRYBAIARIKDQAAAAAV9P3UPBgA",
       "UseAutomatedController": true,
       "PairedControllerDriver": "DRIVER_AUTOMATED",
       "PairedControllerAddress": "FOO",