Streaming bugreport content to stdout 2/2

- Stream compressed content via the socket from dumpstate
- Remove do_zip_file, do_add_data vars in dumpstate
- getopt '-d' and '-z' options are now no-op
- Rename use_control_socket -> progress_updates_to_socket
- Rename use_socket -> stream_to_socket

do_zip_file and do_add_data are now default behaviors.

Also adding a function interface to hook dumpstate `open_socket`
function that would make it easy to do integration tests of streaming
zipped bugreport via socket. Stub the function and capture data from
target file to verify content.

Bug: 162910469
Test: adb bugreport --stream > test.zip; 7z t test.zip
Test: adb shell bugreportz -s > test.zip; 7z t test.zip
Test: atest dumpstate_test
Test: atest dumpstate_test:ZippedBugReportStreamTest
Test: atest dumpstate_smoke_test
Test: manually test combo keys voldown+volup+power to trigger bugreport
      verify logcat kernel buffer shows "Starting service 'bugreport'
      from keychord 114 115 116" and device viberated as expected

Change-Id: Icf79bbc42a5616e85625bd604e543fbf973911da
diff --git a/cmds/dumpstate/dumpstate.h b/cmds/dumpstate/dumpstate.h
index 9582c9d..efe06dc 100644
--- a/cmds/dumpstate/dumpstate.h
+++ b/cmds/dumpstate/dumpstate.h
@@ -54,6 +54,7 @@
 
 class DumpstateTest;
 class ProgressTest;
+class ZippedBugReportStreamTest;
 
 }  // namespace dumpstate
 }  // namespace os
@@ -197,6 +198,7 @@
  */
 class Dumpstate {
     friend class android::os::dumpstate::DumpstateTest;
+    friend class android::os::dumpstate::ZippedBugReportStreamTest;
 
   public:
     enum RunStatus { OK, HELP, INVALID_INPUT, ERROR, USER_CONSENT_DENIED, USER_CONSENT_TIMED_OUT };
@@ -388,12 +390,11 @@
      * Structure to hold options that determine the behavior of dumpstate.
      */
     struct DumpOptions {
-        bool do_add_date = false;
-        bool do_zip_file = false;
         bool do_vibrate = true;
-        // Writes bugreport content to a socket; only flatfile format is supported.
-        bool use_socket = false;
-        bool use_control_socket = false;
+        // Writes bugreport zipped file to a socket.
+        bool stream_to_socket = false;
+        // Writes generation progress updates to a socket.
+        bool progress_updates_to_socket = false;
         bool do_screenshot = false;
         bool is_screenshot_copied = false;
         bool is_remote_mode = false;
@@ -434,13 +435,6 @@
         /* Returns true if the options set so far are consistent. */
         bool ValidateOptions() const;
 
-        /* Returns if options specified require writing bugreport to a file */
-        bool OutputToFile() const {
-            // If we are not writing to socket, we will write to a file. If bugreport_fd is
-            // specified, it is preferred. If not bugreport is written to /bugreports.
-            return !use_socket;
-        }
-
         /* Returns if options specified require writing to custom file location */
         bool OutputToCustomFile() {
             // Custom location is only honored in limited mode.
@@ -466,7 +460,8 @@
 
     std::unique_ptr<Progress> progress_;
 
-    // When set, defines a socket file-descriptor use to report progress to bugreportz.
+    // When set, defines a socket file-descriptor use to report progress to bugreportz
+    // or to stream the zipped file to.
     int control_socket_fd_ = -1;
 
     // Bugreport format version;
@@ -478,8 +473,8 @@
     // `bugreport-BUILD_ID`.
     std::string base_name_;
 
-    // Name is the suffix part of the bugreport files - it's typically the date (when invoked with
-    // `-d`), but it could be changed by the user..
+    // Name is the suffix part of the bugreport files - it's typically the date,
+    // but it could be changed by the user..
     std::string name_;
 
     std::string bugreport_internal_dir_ = DUMPSTATE_DIRECTORY;
@@ -568,6 +563,8 @@
     // called by Shell.
     RunStatus CopyBugreportIfUserConsented(int32_t calling_uid);
 
+    std::function<int(const char *)> open_socket_fn_;
+
     // Used by GetInstance() only.
     explicit Dumpstate(const std::string& version = VERSION_CURRENT);
 
@@ -601,16 +598,6 @@
 int dump_files(const std::string& title, const char* dir, bool (*skip)(const char* path),
                int (*dump_from_fd)(const char* title, const char* path, int fd));
 
-/** opens a socket and returns its file descriptor */
-int open_socket(const char *service);
-
-/*
- * Redirects 'redirect' to a service control socket.
- *
- * Returns true if redirect succeeds.
- */
-bool redirect_to_socket(FILE* redirect, const char* service);
-
 /*
  * Redirects 'redirect' to a file indicated by 'path', truncating it.
  *