fixing the SSR recovery race condition

There is a race condition where when startFix is
called right at the time when modem or griffon
subsystem is down, GPS HAL doesn't get the correct
error code, and therefore the right handling.

Mapped ENGINE_DOWN to ENGINE_OFFLINE, as they are
the same; and modified loc_eng_start_handler to
update the state upon the right error code.

There is a one problem though. General failure is
also handled as SSR. This is because of an unhandled
race condition in the kernel, so the error code
returned and propagated is not deterministic enough
for us to tell if this is SSR. Until that fix is in
place, we might have to treat general failure as SSR
although the side effect should be none. Only
semantically incorrect.

Change-Id: If93823f08428275da171bb22d73a06e38365585b
CR-Fixed: 692085
loc timer util fix to handle the race condition

loc timer util stop() routine may have race condition
with the timer thread, when timer expires at the same
time stop() routine tries to lock mutex.  The race
condition can go 2 ways:
* timer thread expires, unlocks mutex, context switch,
stop() thread acquires lock, context switch, timer
thread destroys mutex.  Destroy will fail, resulting
mutex leak.
* timer thread expires, unlocks mutex, destroys mutex,
stop() acqures lock, signal, and releases lock. Would
be super rare conditions though.

Fix is that we give 5 seconds for stop() thread to
give up the lock when destroy. After that the timer
thread will release the mutex and go on destroy.
Meanwhile the stop() thread would check the lock
return to move on with signal and unlock.

Change-Id: Iff9e34d08a1faf0828049de2fede2e7a5d15b161
CRs-Fixed: 699856
Fix for CR 692085, error mapping incorrect in one of the cases

eLOC_CLIENT_FAILURE_INTERNAL returned from loc_api_v02 was mapped
to LOC_API_ADAPTER_ERR_FAILUR, however in loc_eng_start_handle it
is LOC_API_ADAPTER_ERR_GENERAL_FAILURE that is being checked for.
Created a new error ID LOC_API_ADAPTER_ERR_INTERNAL specifically
for this error case.

Change-Id: Ib2ad6e983d6c598ec57f1a2584166da2be95946b
CRs-Fixed: 706520
Platform:ADPES2,Chip Info:APQ8064 Automotive

Changes to include "auto" option as well for ro.baseband property.
submitting on behalf of Madhanraj Chelladurai

Change-Id: I96abaea799df34d375a6a5db7341c17b99c94675
Changes for External DR enablement feature.

Change Summary:
* Structure definitions for GNSS SV Measurement and GNSS SV
  Polynomial to report it to ULP and to external DR module;
* New function additions in LocApiBase, LocAdapterBase and
  LocEngAdapter to report SV Measurement and SV Polynomial;
* definition and changes to detect "auto" platform in loc_target;
* enable SV Measurement and SV Polynomial report for "auto"
  platform;

Change-Id: I0611023197ce58f5d083588809c2f18922738357