Revert "Add NCI command to get observe mode state"

This reverts commit e55157b2c08db83d32dab78235843a144031865b.

Reason for revert: Seeing ANRs because ST HAL doesn't support this command yet
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:5bf89f5cdc2a428bd644b81119cea32a727a7c2c)
Merged-In: Ia68450c8ecc4dd4d27bc5341bec509c49572c287
Change-Id: Ia68450c8ecc4dd4d27bc5341bec509c49572c287
1 file changed