Implement Auto-reconnect after disconnection [1]

PiperOrigin-RevId: 592344338

internal/platform/feature_flags.h

@@ -63,6 +63,12 @@ class FeatureFlags {
     // on Windows when connecting to FP service id but the rfcomm is successful.
     bool skip_service_discovery_before_connecting_to_rfcomm = false;
     std::int32_t min_nc_version_supports_safe_to_disconnect = 1;
+    std::int32_t min_nc_version_supports_auto_reconnect = 3;
+    absl::Duration auto_reconnect_retry_delay_millis = absl::Milliseconds(5000);
+    absl::Duration auto_reconnect_timeout_millis = absl::Milliseconds(30000);
+    std::int32_t auto_reconnect_retry_attempts = 3;
+    absl::Duration auto_reconnect_skip_duplicated_endpoint_duration =
+        absl::Milliseconds(4000);
     // Android code won't be able to launch "payload_received_ack" feature for
     // in near future, so change "payload_received_ack" version from "2" to "5"
     // after auto-reconnect and auto-resume.
@@ -73,6 +79,8 @@ class FeatureFlags {
         absl::Milliseconds(30000);
     absl::Duration safe_to_disconnect_remote_disc_delay_millis =
         absl::Milliseconds(10000);
+    absl::Duration safe_to_disconnect_auto_resume_timeout_millis =
+        absl::Milliseconds(60000);
     // If the receiver doesn't ack with payload_received_ack frame in 1s, the
     // sender will timeout the waiting.
     absl::Duration wait_payload_received_ack_millis = absl::Milliseconds(1000);

internal/platform/implementation/BUILD

@@ -40,6 +40,7 @@ cc_library(
         "timer.h",
     ],
     visibility = [
+        "//connections/implementation:__subpackages__",
         "//connections/implementation/analytics:__subpackages__",
         "//fastpair:__subpackages__",
         "//internal/account:__pkg__",