Add e2fs tools to Android SDK build-tools

fastboot calls mke2fs and e2fsdroid to format ext4 partition.

Bug: 35219933
Change-Id: Ica9713cbc07f18215f5712d46aeb18109a06ba2e
diff --git a/build/sdk.atree b/build/sdk.atree
index 158429c..17c7de6 100644
--- a/build/sdk.atree
+++ b/build/sdk.atree
@@ -44,6 +44,8 @@
 # host tools from out/host/$(HOST_OS)-$(HOST_ARCH)/
 bin/adb                                 strip platform-tools/adb
 bin/fastboot                            strip platform-tools/fastboot
+bin/mke2fs                              strip platform-tools/mke2fs
+bin/e2fsdroid                           strip platform-tools/e2fsdroid
 bin/sqlite3                             strip platform-tools/sqlite3
 bin/dmtracedump                         strip platform-tools/dmtracedump
 bin/etc1tool                            strip platform-tools/etc1tool