Update framework from jetpack.

Included changes:
* b7122be: Update Builders to comply with API council requirements.
* 60b34cd: Changes to AppSearchSchema builders to comply with API requirements.
* c6f7eee: Support property paths in GenericDocument.
* cbee331: Update documentation to distinguish between AppSearchSession and GlobalSearchSession
* cbdd3b9: Rename ReportUsage#usageTimeMillis to #usageTimestampMillis.
* cc09d3a: Implement value indices in GenericDocument.
* e7faa03: Rename isIndexNestedProperties to shouldIndexNestedProperties.
* aaa6e81: Support @CurrentTimeMillisLong in export.
* 388c2b4: Rename GenericDocument's "uri" to "id" everywhere.

Bug: 184576792
Bug: 184576806
Bug: 184174844
Bug: 180481315
Bug: 179797058
Bug: 175146044
Bug: 184175636
Bug: 185492298
Test: Presubmit
Change-Id: I81e396c1d4770479654a3a69ea598e23de88ac9a