Add AuthTokenTable.

Keystore will use this to manage authentication tokens and identify the
correct one to be submitted to keymaster to authorize an
authentication-requiring operation.

Bug: 19511945
Change-Id: Ie6d2db4bebfa3734e535498d20928b8f8965963c
diff --git a/keystore/.clang-format b/keystore/.clang-format
new file mode 100644
index 0000000..5747e19
--- /dev/null
+++ b/keystore/.clang-format
@@ -0,0 +1,10 @@
+BasedOnStyle: LLVM
+IndentWidth: 4
+UseTab: Never
+BreakBeforeBraces: Attach
+AllowShortFunctionsOnASingleLine: Inline
+AllowShortIfStatementsOnASingleLine: false
+IndentCaseLabels: false
+ColumnLimit: 100
+PointerBindsToType: true
+SpacesBeforeTrailingComments: 2