Adding alinazaidi@ in Launcher3's OWNERS

For some reason, I was unable to do it with others in the CL.

Note: This is a merge from AOSP.

Test: N/A
Merged-In: I02596028dd15e1fdbe255b954bd39f4c3bb005e2
Change-Id: I70172726b6aae7c7b210e4b3210d34dc1c503c06
Bug: 182399964