Don't format string literals in annotation

Previously, @anno(arg="a = 1 || b = 2") was incorrectly formatted into
@anno(arg="a = 1 || b=2"). This CL fixes that by not formating
double-quoted string values.

Bug: 199268674
Test: $ cat | ./aidl-format.sh
interface Foo { @anno(arg="a = 1 || b = 2") void foo();}
^D
interface Foo {
    @anno(arg="a = 1 || b = 2") void foo();
}

Change-Id: I7365bfc6e400c8f0726bbea660d13d2b1ffbc867
1 file changed