tree 2593d5176771eefdd5f58e906615939dcd28294f
parent 18271d623220377a1dbf5dd15dffb7ce89a387b9
author Evan Laird <evanlaird@google.com> 1678480090 -0500
committer Evan Laird <evanlaird@google.com> 1678712773 +0000

[Sb refactor] Fix missed telephony callback events

This change implements a new flow operator, `coalesce`, whichs allows
for us to design a backpressure strategy in
`MobileConnectionRepositoryImpl` such that we never drop a
`TelephonyCallback` event if it is the only one of its type.

In practice, this means that if we have a late subscriber to a field
which is backed by the `callbackEvents` flow, we'll never miss data that
would otherwise have been dropped due to unrelated callbacks before the
subscriber shows up.

Test: tests in statusbar/pipeline/mobile
Test: MobileConnectionTelephonySmokeTests
Fixes: 272784824
Change-Id: Id57cc4047d9290581e6b8eae813136ebfb8eb3be