[tracker] (36 commits) Non-fast-forward update to branch wip/carlosg/portal

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/carlosg/portal' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  4a1d75c... libtracker-data: Add support for graph/service control over
  818f0c8... libtracker-data: Add support for CONSTRAINT query prologues
  88b8d47... libtracker-data: Allow reducing set to the empty graph
  3b3ef64... libtracker-data: Remove dead code
  a9cda71... libtracker-data: Refactor find_graph() function
  f8f06cc... libtracker-data: Filter find_graph() by the given constrain
  0b00177... libtracker-data: Restrict all uses of tracker_triples to th
  e21b86a... libtracker-common: Add method to build dbus URI
  dea82ab... libtracker-data: Implement DEFAULT/ALL in CONSTRAINT declar
  b66745d... libtracker-data: Filter down updates on forbidden graphs
  01cec9e... libtracker-data: Check graph permissions on graph manipulat
  45e2096... libtracker-data: Add graph policy checks on FTS queries
  ce0958f... libtracker-sparql: Export DBus endpoint structs in private 
  f985919... libtracker-sparql: Add private filtering methods to Tracker
  02c26d5... build: restore dbus/systemd options
  19d3733... portal: Add XDG portal implementation
  65763d6... portal: Implement filtering endpoint
  da05941... libtracker-bus: Fallback through portal on bus connections
  208375d... examples: Add example flatpak definition
  8816138... portal: Handle */default keywords in policy
  41a7c30... portal: Set up watch on peers
  f3cc23e... portal: Add DBus service file
  a5fb027... docs: Add tracker3-xdg-portal manpage
  72abb22... portal: Add CloseSession request
  fe4a2d9... libtracker-bus: Explicitly close sandbox sessions on connec
  5396172... libtracker-data: Cache connections in SERVICES{} virtual ta
  4258f5f... portal: Add systemd user session unit file
  f899b09... portal: Handle missing .flatpak-info file
  c373f46... tests: Add tests for CONSTRAINT declarations in prologue
  9101f83... portal: Handle default object path in lookups
  bcef1d1... ci: Don't install systemd user services
  831ee6b... libtracker-data: Allow prefixed names in constraint rules
  33e0bf1... portal: Allow prefixed names in graph constraints
  ad52d70... tracker: Initialize variable

Commits added to the branch:

  0ac6c75... Update Greek translation (*)
  5d23e24... libtracker-data: Add support for graph/service control over
  8d642e3... libtracker-data: Add support for CONSTRAINT query prologues
  cdb2352... libtracker-data: Allow reducing set to the empty graph
  7c816f1... libtracker-data: Remove dead code
  94329a0... libtracker-data: Refactor find_graph() function
  3dac05d... libtracker-data: Filter find_graph() by the given constrain
  f4aa3ae... libtracker-data: Restrict all uses of tracker_triples to th
  48bee50... libtracker-common: Add method to build dbus URI
  643866e... libtracker-data: Implement DEFAULT/ALL in CONSTRAINT declar
  3e7ec47... libtracker-data: Filter down updates on forbidden graphs
  5b05052... libtracker-data: Check graph permissions on graph manipulat
  22ebbfa... libtracker-data: Add graph policy checks on FTS queries
  f72dac5... libtracker-sparql: Export DBus endpoint structs in private 
  fe7736e... libtracker-sparql: Add private filtering methods to Tracker
  ac3eeb8... build: restore dbus/systemd options
  41017d1... portal: Add XDG portal implementation
  1a1dd3c... portal: Implement filtering endpoint
  f2f8833... libtracker-bus: Fallback through portal on bus connections
  48811cc... examples: Add example flatpak definition
  9c06e93... portal: Handle */default keywords in policy
  cf7a5ff... portal: Set up watch on peers
  69506ee... portal: Add DBus service file
  160f706... docs: Add tracker3-xdg-portal manpage
  edc8313... portal: Add CloseSession request
  7d03185... libtracker-bus: Explicitly close sandbox sessions on connec
  b1300c4... libtracker-data: Cache connections in SERVICES{} virtual ta
  aa3e994... portal: Add systemd user session unit file
  54f4281... portal: Handle missing .flatpak-info file
  b3d3837... tests: Add tests for CONSTRAINT declarations in prologue
  8a745e1... portal: Handle default object path in lookups
  de9e671... ci: Don't install systemd user services
  91feceb... libtracker-data: Allow prefixed names in constraint rules
  dc30f02... portal: Allow prefixed names in graph constraints
  97c0c7a... tracker: Initialize variable
  ee166fa... libtracker-sparql: Allow NULL store in tracker_sparql_conne

(*) This commit already existed in another branch; no separate mail sent