Perfetto

Tracing service and probes:
* Added reporting of TZ offset under system_info.timezone_off_mins .
* Added no_flush option to DataSourceDescriptor to avoid unnecessary IPC
roundtrips to flush data sources like track_event that rely uniquely on
server-side scraping.
* Added support for running on Linux & Android systems configured with 16K
pagetables.
Trace Processor:
* Added android_boot metric.
* Added new PerfettoSQL syntax (CREATE PERFETTO VIEW) for adding schemas to views.
* Added support for the perf.data import format.
* Added dvfs and cpu_idle to stdlib.
UI:
* Added a new type of debug tracks: counter.
* Improved visualization of timestamps for durations.

Tracing service and probes:
* Added capability to transfer and clear buffers on CLONE_SNAPSHOT.
* Added new service for relaying IPC messages from local producers to a
remote tracing instance.
Trace Processor:
* Added new PerfettoSQL syntax (INCLUDE PERFETTO MODULE) for including
tables/views/functions defined in SQL modules.
* Added new PerfettoSQL syntax (CREATE PERFETTO TABLE) for defining analytic
tables in SQL.
* Added new PerfettoSQL syntax (CREATE PERFETTO MACRO) for defining macros
in SQL.
* Added TO_REALTIME function to convert timestamps to the realtime clock.
* Added support for parsing binder_command and binder_return events.
UI:
* Added support for zooming when using deep-links.
* Added track for displaying screenshots in traces.
* Added support for displaying UTC timestamps.
* Added capability to list, search and debug plugin tracks.
* Added plugins with commands for pinning tracks for latency and large
screen debugging in Android.

Tracing service and probes:
* Fixed a bug which would cause sessions cloned with CLONE_SNAPSHOT to not
inherit the trace filtering config.
* Fixed a bug that would cause flushes to be acked prematurely in
traced_probes if the android.package_list data source is present.
SDK:
* Fix build with MSVC.
UI:
* Added command palette (CTRL/Meta+Shift+P).
* Added grouping of global tracks into groups to reduce visual pollution.
* Added ability to toggle timestamps between trace / boot / wall time.
* Added recording UI for callstack sampler.
* Added "Viz" page to run chart query results with Vega-Lite.
* Highlight debuggable apps, which might have worse performance
characteristics, with a chip on the corresponding tracks.
Misc:
* master -> main branch migration. HEAD is now main, master is for now a
mirror and will become a stale frozen snapshot.

Trace Processor:
* Fix compile on Windows.

Tracing service and probes:
* Fixed unnecessary reads of thread files /proc when scraping process names.
Trace Processor:
* Rewrote filtering engine to be significantly faster on a wide range of
common queries.
* Significantly improved quality of PerfettoSQL error messages.
* Added API to retrieve last executed statement from iterator.
* Added support for filtering rows by a regex.
UI:
* Fixed flow events working for async tracks.
* Added table viewer for slice-like tables.
SDK:
* Reduce binary size impact of macro and template expansions.

Tracing service and probes:
* Compression has been moved from perfetto_cmd to traced. Now compression is
supported even with write_into_file. The `compress_from_cli` config option
can be used to restore the old behavior.
* Changed the android.statsd datasource to batch multiple atoms into
a single trace packet. This improves performance and information
density.
Trace Processor:
* Fixed protozero parsing code to support field ids larger than
2^16 - 1. protozero now supports field ids up to 1,000,000
See https://github.com/google/perfetto/issues/510.
UI:
* Add support for deep links into the UI via query parameters.
* Fixed multiple issues around the display of track event log
messages See https://github.com/google/perfetto/issues/507.