Support 'adb reboot fastboot' command conditionally.

Devices not supporting logical partitions do not require the command.

Bug: 78793464
Test: 'adb reboot fastboot' reboots to bootloader for a device
not supporting logical partitions.

Change-Id: I0a7b6d4335040e24efbf461e2dd2d56ab1985b7f
diff --git a/adb/daemon/services.cpp b/adb/daemon/services.cpp
index 8417690..2bac486 100644
--- a/adb/daemon/services.cpp
+++ b/adb/daemon/services.cpp
@@ -103,7 +103,9 @@
     if (reboot_arg.empty()) reboot_arg = "adb";
     std::string reboot_string = android::base::StringPrintf("reboot,%s", reboot_arg.c_str());
 
-    if (reboot_arg == "fastboot" && access("/dev/socket/recovery", F_OK) == 0) {
+    if (reboot_arg == "fastboot" &&
+        android::base::GetBoolProperty("ro.boot.logical_partitions", false) &&
+        access("/dev/socket/recovery", F_OK) == 0) {
         LOG(INFO) << "Recovery specific reboot fastboot";
         /*
          * The socket is created to allow switching between recovery and
diff --git a/init/reboot.cpp b/init/reboot.cpp
index 2f88121..b84bfd3 100644
--- a/init/reboot.cpp
+++ b/init/reboot.cpp
@@ -464,6 +464,12 @@
         cmd = ANDROID_RB_RESTART2;
         if (cmd_params.size() >= 2) {
             reboot_target = cmd_params[1];
+            // adb reboot fastboot should boot into bootloader for devices not
+            // supporting logical partitions.
+            if (reboot_target == "fastboot" &&
+                !android::base::GetBoolProperty("ro.boot.logical_partitions", false)) {
+                reboot_target = "bootloader";
+            }
             // When rebooting to the bootloader notify the bootloader writing
             // also the BCB.
             if (reboot_target == "bootloader") {