vibrator: Add a usleep before wait for completion

Seems there will be a race condition if we wait for completion too
early, so add a usleep(10000) before we wait for completion.

Note that this also aligns the implementation with stock.

Change-Id: I4c74928aa3d438f07a860e0b4f28a35ab654a6e3

Author: hellobbn

aidl/vibrator/cs40l25/Vibrator.cpp

@@ -520,6 +520,7 @@ ndk::ScopedAStatus Vibrator::on(uint32_t timeoutMs, uint32_t effectIndex,
     mHwApi->setEffectIndex(effectIndex);
     mHwApi->setDuration(timeoutMs);
     mHwApi->setActivate(1);
+    usleep(10000);
     // Using the mToalDuration for composed effect.
     // For composed effect, we set the UINT32_MAX to the duration sysfs node,
     // but it not a practical way to use it to monitor the total duration time.