DO NOT MERGE ANYWHERE - Update tools_ndk_r9d to use main branch.

Bug: b/289400079
Change-Id: I54d425a9310462a56a3a2d8a5b9032e906c7956d

default.xml

@@ -4,7 +4,7 @@
   <remote  name="aosp"
            fetch=".."
            review="https://android-review.googlesource.com/" />
-  <default revision="master"
+  <default revision="main"
            remote="aosp"
            sync-j="4" />
 
@@ -23,7 +23,7 @@
   <project path="developers/demos" name="platform/developers/demos" />
   <project path="developers/docs" name="platform/developers/docs" />
   <project path="developers/samples/android" name="platform/developers/samples/android" />
-  <project path="development" name="platform/development" />
+  <project path="development" name="platform/development" revision="tools_ndk_r9d" />
   <project path="device/asus/deb" name="device/asus/deb" groups="device,flo" />
   <project path="device/asus/flo" name="device/asus/flo" groups="device,flo" />
   <project path="device/asus/flo-kernel" name="device/asus/flo-kernel" groups="device,flo" />
@@ -296,7 +296,7 @@
   <project path="hardware/ti/omap4xxx" name="platform/hardware/ti/omap4xxx" groups="omap4" />
   <project path="libcore" name="platform/libcore" />
   <project path="libnativehelper" name="platform/libnativehelper" groups="pdk-java" />
-  <project path="ndk" name="platform/ndk" />
+  <project path="ndk" name="platform/ndk" revision="tools_ndk_r9d" />
   <project path="packages/apps/BasicSmsReceiver" name="platform/packages/apps/BasicSmsReceiver" />
   <project path="packages/apps/Bluetooth" name="platform/packages/apps/Bluetooth" />
   <project path="packages/apps/Browser" name="platform/packages/apps/Browser" />