Scale timeouts in debuggerd and llkd.

Respect ro.timeout_multiplier property. Some of these are required for
tombstone writing to work on MTE QEMU, the rest are done speculatively.

Test: add crashing code to system_server, observe the tombstone
Bug: 178231152
Change-Id: Ic86e494af571301df7af07d13a6c046a0da6bda7