default: fork platform_testing repo

Due to a regression on Android Automotive OS build doing in android 14
release 51 we need to fork platform_testing repository to fix build
issue.

Change-Id: I5a5fe11eaa014ba31e67e0a11afc696387be98b8
Signed-off-by: Guillaume La Roque <glaroque@baylibre.com>

default.xml

@@ -1409,6 +1409,8 @@
 <!-- AOSP Forks -->
   <remove-project name="platform/external/v4l2_codec2" />
   <project path="external/v4l2_codec2" name="external/v4l2_codec2" remote="baylibre" revision="ti-android-14" groups="ti" />
+  <remove-project name="platform/platform_testing" />
+  <project path="platform_testing" name="platform_testing" remote="baylibre" revision="ti-android-14" groups="ti" />
 
 <!-- non AOSP TI Projects -->
   <project path="device/ti/am62x" name="device/ti/am62x" remote="baylibre" revision="ti-android-14" groups="device,ti" />