Concatenate string literals at compile time.

This CL was generated by running:
git ls-files | grep ".cc" | xargs perl -i -ne 'BEGIN {undef $/}; s/("[\s\n]*<<[\s\n]*")/" "/g; print;'; git cl format

After that I manually edited modules/audio_processing/gain_controller2.cc to preserve its original
formatting.

This primary benefit of this change is a small reduction in binary size.

Bug: None
Change-Id: I689fa7ba9c717c314bb167e5d592c3c4e0871e29
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/165961
Reviewed-by: Alessio Bazzica <alessiob@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Jonas Olsson <jonasolsson@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30251}

modules/audio_coding/neteq/decision_logic.cc

@@ -53,7 +53,8 @@ DecisionLogic::DecisionLogic(NetEqController::Config config)
       {&estimate_dtx_delay_, &time_stretch_cn_, &target_level_window_ms_},
       field_trial_name);
   RTC_LOG(LS_INFO) << "NetEq decision logic settings:"
-                   << " estimate_dtx_delay=" << estimate_dtx_delay_
+                      " estimate_dtx_delay="
+                   << estimate_dtx_delay_
                    << " time_stretch_cn=" << time_stretch_cn_
                    << " target_level_window_ms=" << target_level_window_ms_;
 }