Add external/tensorflow to the manifest.

Bug: 69264167
Test: repo sync
Change-Id: Ia6fa61f76fec82a5618f287bddeced732305e122
Merged-In: I23b62226f9247d59af1488ec74d8c8d07aa51f9d

default.xml

@@ -324,6 +324,7 @@
   <project path="external/swiftshader" name="platform/external/swiftshader" groups="pdk" />
   <project path="external/syslinux" name="platform/external/syslinux" groups="pdk" />
   <project path="external/tagsoup" name="platform/external/tagsoup" groups="pdk,pdk-cw-fs,pdk-fs" />
+  <project path="external/tensorflow" name="platform/external/tensorflow" />
   <project path="external/testng" name="platform/external/testng" groups="pdk" />
   <project path="external/tcpdump" name="platform/external/tcpdump" groups="pdk,pdk-cw-fs,pdk-fs" />
   <project path="external/timezonepicker-support" name="platform/external/timezonepicker-support" groups="pdk-cw-fs,pdk-fs" />