Revert "leaudio: Make LE Connection Interval a multiple of SDU_Interval"

This reverts commit fa97f8d0.

Reason for revert: 60ms is above the maximum recommended initial connection interval, slow down the encryption procedure

Test: testplans/1161726
Bug: 233417283

Merged-In: I0c117718f391b9ecf53fb263253eff4b7b59e8f1
Change-Id: I0c117718f391b9ecf53fb263253eff4b7b59e8f1
(cherry picked from commit cbf93504)
(cherry picked from commit a312a815)
Merged-In: I0c117718f391b9ecf53fb263253eff4b7b59e8f1