[adb] Speed up the streaming install

1. Use bigger buffer for transfers - 64kb is the default size
   for push, so let it be the same in streaming

2. Use abb when it's available for lower overhead

3. Add a posix_fadvise() on the source APK

4. Increase buffer sizes for the socketpair that's transferring
the data from adbd.

Overall this saves about 25% time for streaming installations
and makes it faster than the legacy push (at last!)

Test: manual
Change-Id: Ieb84284da2058944815e062ef6e4389b842565fa
diff --git a/adb/client/commandline.h b/adb/client/commandline.h
index 6cfd4f7..cd5933a 100644
--- a/adb/client/commandline.h
+++ b/adb/client/commandline.h
@@ -17,7 +17,11 @@
 #ifndef COMMANDLINE_H
 #define COMMANDLINE_H
 
+#include <android-base/strings.h>
+
 #include "adb.h"
+#include "adb_client.h"
+#include "adb_unique_fd.h"
 
 // Callback used to handle the standard streams (stdout and stderr) sent by the
 // device's upon receiving a command.
@@ -105,4 +109,17 @@
         const std::string& command, bool disable_shell_protocol = false,
         StandardStreamsCallbackInterface* callback = &DEFAULT_STANDARD_STREAMS_CALLBACK);
 
+// Connects to the device "abb" service with |command| and returns the fd.
+template <typename ContainerT>
+unique_fd send_abb_exec_command(const ContainerT& command_args, std::string* error) {
+    std::string service_string = "abb_exec:" + android::base::Join(command_args, ABB_ARG_DELIMETER);
+
+    unique_fd fd(adb_connect(service_string, error));
+    if (fd < 0) {
+        fprintf(stderr, "adb: failed to run abb_exec. Error: %s\n", error->c_str());
+        return unique_fd{};
+    }
+    return fd;
+}
+
 #endif  // COMMANDLINE_H