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Make companion callback calls oneway
These were never meant to be 2way, and are calling application callbacks, from system server which can potentially take long time. Thses should not be sensitive to ordering with any other IPCs, so moving them from 2way to 1way should be safe. Fixes: 147705675 Test: presubmit Change-Id: Ie4e8941fba2c8a388697c3a42ad6ef76512eba9f