Fix proguard keep rule for constructors.

Proguard expects either the full qualified name or <init> for constructors.

Before (invalid keep rule):
-keep class com.google.android.Foo {
    Foo(java.lang.String);
}

After:
-keep class com.google.android.Foo {
    <init>(java.lang.String);
}

Change-Id: I9d7feaafe112fafb1f58ae534ed915e69033a36c
1 file changed