Support blink scan

Allow scan again if callback and executor are same as before.

bug: 173239634
Test: atest -c TunerTest
Change-Id: Iec5ba453b3d3d40c0d96fda5c7288b79898d9aea
Merged-In: Iec5ba453b3d3d40c0d96fda5c7288b79898d9aea
1 file changed