Revert "Route backup data through IntermediateEncryptingTransport"

This is a revert of the "Route backup data through IntermediateEncryptingTransport" in ag/9447053

This is to fix the possible device crash from the new code till the new
code is fixed

Bug: 142381823
Test: atest -v RunBackupFrameworksServicesRoboTests
Test: atest -v $(find frameworks/base/services/tests/servicestests/src/com/android/server/backup -name '\''*Test.java'\'')'
Test: atest -v CtsBackupTestCases CtsBackupHostTestCases
Change-Id: I6fb1e513f481fb5d58816057bb69212511239707