Fixed Content Capture workflow when service package is updated.

The workflow already handles the case where the service dies and the framework re-establishes
the binder connection, but that didn't work when it died because the package was being updated.

This CL fixes this scenario by gracefully pausing the existing sessions before the package is
updated, then resuming them afterwards.

Test: manual verification
Test: atest CtsContentCaptureServiceTestCases # sanity check minus flakiness

Bug: 126266412
Fixes: 129072171

Change-Id: Ibc6b723c7bc08b4f920436f365d6006bc8fac7b6