adb: don't spew push/pull progress to dumb terminals.

Bug: http://b/113070277
Test: adb push 100mb /data/local/tmp | cat
Test: adb sync | cat
Change-Id: I252bdbdbde825bba903f43bd892262786a58c4e4
diff --git a/client/line_printer.cpp b/client/line_printer.cpp
index 9758526..4dc2d28 100644
--- a/client/line_printer.cpp
+++ b/client/line_printer.cpp
@@ -67,7 +67,11 @@
 
 void LinePrinter::Print(string to_print, LineType type) {
   if (!smart_terminal_) {
-    Out(to_print + "\n");
+    if (type == LineType::INFO) {
+        info_line_ = to_print + "\n";
+    } else {
+        Out(to_print + "\n");
+    }
     return;
   }
 
@@ -123,6 +127,11 @@
 }
 
 void LinePrinter::KeepInfoLine() {
-  if (!have_blank_line_) Out("\n");
-  have_blank_line_ = true;
+  if (smart_terminal_) {
+      if (!have_blank_line_) Out("\n");
+      have_blank_line_ = true;
+  } else {
+      Out(info_line_);
+      info_line_.clear();
+  }
 }