Notify remote name failed for LE device

When cancel discovery for LE device in BTA_DM_DISCOVER_ACTIVE state,
there is no notification to indicate the remote name request of LE
device is cancelled and change the search state back to
BTA_DM_SEARCH_IDLE state. Call btm_inq_rmt_name_failed_cancelled()
to notify in this situation.

Bug: 146840780
Test: Manual
Change-Id: I4ab2a2f413e4ac19765476039f4127ce045e84d9