[incremental/pm] app states and transitions

Based on go/incremental-states-design with basic
setter/getters.

Defines IncrementalStates class which handles state transitions.

New (internal) Intent actions: PACKAGE_FULLY_LOADED, PACKAGE_STARTABLE,
PACKAGE_UNSTARTABLE.

BUG: 168043976
Test: unit tests
Change-Id: I7b0ec2dd9f028ee620a9307a1e71ddf12ea5a9af
diff --git a/services/incremental/IncrementalService.cpp b/services/incremental/IncrementalService.cpp
index bbcb312..5f145f3 100644
--- a/services/incremental/IncrementalService.cpp
+++ b/services/incremental/IncrementalService.cpp
@@ -2135,6 +2135,11 @@
     return binder::Status::ok();
 }
 
+binder::Status IncrementalService::DataLoaderStub::reportStreamHealth(MountId mountId,
+                                                                      int newStatus) {
+    return binder::Status::ok();
+}
+
 bool IncrementalService::DataLoaderStub::isHealthParamsValid() const {
     return mHealthCheckParams.blockedTimeoutMs > 0 &&
             mHealthCheckParams.blockedTimeoutMs < mHealthCheckParams.unhealthyTimeoutMs;