Provide ResourceSyncParams based DownloadManager for syncing data.

[aditya-07]

IMPORTANT: All PRs must be linked to an issue (except for extremely trivial and straightforward changes).

Fixes #1258

Description
Implemented ResourceParamsBasedDownloadManager which takes ResourceSyncParams to generate the search urls for the resources and parses Bundle SearchSet to get extract resources and next urls.

Alternative(s) considered
No

Type
Choose one: Code health

Screenshots (if applicable)

Checklist

• I have read and acknowledged the Code of conduct.
• [ x I have read the Contributing page.
• I have signed the Google Individual CLA, or I am covered by my company's Corporate CLA.
• I have discussed my proposed solution with code owners in the linked issue(s) and we have agreed upon the general approach.
• I have run ./gradlew spotlessApply and ./gradlew spotlessCheck to check my code follows the style guide of this project.
• I have run ./gradlew check and ./gradlew connectedCheck to test my changes locally.
• I have built and run the demo app(s) to verify my change fixes the issue and/or does not break the demo app(s).

[omarismail94]

Nice change! Just one minor comment

[codecov]

Codecov Report

Merging #1259 (fbb7534) into master (a292e50) will decrease coverage by 0.22%.
The diff coverage is 90.90%.

@@             Coverage Diff              @@
##             master    #1259      +/-   ##
============================================
- Coverage     84.15%   83.92%   -0.23%     
- Complexity      666      678      +12     
============================================
  Files           146      147       +1     
  Lines         10609    10622      +13     
  Branches        807      844      +37     
============================================
- Hits           8928     8915      -13     
+ Misses         1278     1271       -7     
- Partials        403      436      +33     

Impacted Files	Coverage Δ
...c/main/java/com/google/android/fhir/sync/Config.kt	94.73% <ø> (+29.51%)	⬆️
...src/main/java/com/google/android/fhir/sync/Sync.kt	23.80% <ø> (ø)
...n/java/com/google/android/fhir/sync/SyncJobImpl.kt	53.48% <ø> (-4.66%)	⬇️
...download/ResourceParamsBasedDownloadWorkManager.kt	85.71% <85.71%> (ø)
...ava/com/google/android/fhir/sync/FhirSyncWorker.kt	93.47% <100.00%> (ø)
...a/com/google/android/fhir/sync/FhirSynchronizer.kt	79.31% <100.00%> (-3.45%)	⬇️
...oogle/android/fhir/sync/download/DownloaderImpl.kt	100.00% <100.00%> (ø)
...alidation/PrimitiveTypeAnswerMinLengthValidator.kt	70.00% <0.00%> (-20.00%)	⬇️
...com/google/android/fhir/datacapture/DataCapture.kt	66.66% <0.00%> (-16.67%)	⬇️
...main/java/com/google/android/fhir/DatastoreUtil.kt	80.00% <0.00%> (-10.00%)	⬇️
... and 18 more

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[jingtang10]

do the following

1. remove SyncConfiguration in Config.kt and clean up ParamMap.concatParams
2. move ResourceSyncParams to this file
3. rename ResourceSyncParams to ResourceSearchParams as they are actually search parameters and have nothing to do with uploading.