Revert "Revert "Revert "Revert "hammerhead: Add support for modem logging""""

This reverts commit 35deeefd40451a584a4ef8df2b47c87c58b8f898.
Revert "hammerhead: Disable subsystem ramdump collection"

This reverts commit 42aaafc30e1d899cdc3a2f30fa952987c9da697a.

Change-Id: I1215143de6b62cc5691dbd6dc1d3d10a7422a987
Revert "Revert "hammerhead: Disable subsystem ramdump collection"" [DO NOT MERGE]

This reverts commit 98154d5b1eeddbb8d72d88876b867a921cec6b36.

Disable subsystem ramdump.

Bug: 12486394 

Change-Id: Ia6c3af2260616c6dcf5c8fe2d2d969e7dab1101f
Merge changes Ia6c3af22,I1215143d,I62c468c2 into du44

* changes:
  Revert "Revert "hammerhead: Disable subsystem ramdump collection"" [DO NOT MERGE]
  Revert "hammerhead: Disable subsystem ramdump collection"
  Revert "Revert "Revert "Revert "hammerhead: Add support for modem logging""""