style: remove vale directives from Android flashing doc

Author: juliosuas

source/android/Overview_Flashing.rst

@@ -120,8 +120,6 @@ Once the build is complete, follow the steps below to flash the images to eMMC.
    - On the left, a terminal to send commands from the PC to the device
    - On the right, the ``picocom`` console to run commands on the device
 
-   .. vale off
-
    .. list-table::
       :header-rows: 1
 
@@ -440,5 +438,3 @@ Once the build is complete, follow the steps below to flash the images to eMMC.
 
 
 #. Board should boot the Android images now.
-
-.. vale on