fastbootd: Enable erase and flash commands for physical partitions.

Bug: 78793464
Test: adb reboot fastboot && fastboot flashall

Change-Id: Ibe802c36f6efe20111a2315616ef34d3a027950f
diff --git a/fastboot/Android.bp b/fastboot/Android.bp
index e9bb1d7..19f6390 100644
--- a/fastboot/Android.bp
+++ b/fastboot/Android.bp
@@ -94,6 +94,7 @@
     srcs: [
         "device/commands.cpp",
         "device/fastboot_device.cpp",
+        "device/flashing.cpp",
         "device/main.cpp",
         "device/usb_client.cpp",
         "device/utility.cpp",