Handle finished bugreports, share from private.

Show notification when a bugreport is finished, letting the user
launch a SEND_MULTIPLE intent to share them.  Add dialog that warns
user about contents before sharing.  Since bugreports are now stored
in private app data of the Shell app, use FileProvider to build Uris
that we can grant others access to.

Define BUGREPORT_FINISHED as being a protected broadcast.  Delete
older bugreports automatically to reclaim disk space.  Migrate any
Intent extras to ClipData when building PendingIntents.

Add --receiver-permission support to am shell command.

Bug: 7005318
Change-Id: If6c607dbcf137362d5887eac482ff7391563890f
diff --git a/packages/Shell/src/com/android/shell/BugreportPrefs.java b/packages/Shell/src/com/android/shell/BugreportPrefs.java
new file mode 100644
index 0000000..3748e89
--- /dev/null
+++ b/packages/Shell/src/com/android/shell/BugreportPrefs.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.shell;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+
+/**
+ * Preferences related to bug reports.
+ */
+public class BugreportPrefs {
+    private static final String PREFS_BUGREPORT = "bugreports";
+
+    private static final String KEY_WARNING_STATE = "warning-state";
+
+    public static final int STATE_UNKNOWN = 0;
+    public static final int STATE_SHOW = 1;
+    public static final int STATE_HIDE = 2;
+
+    public static int getWarningState(Context context, int def) {
+        final SharedPreferences prefs = context.getSharedPreferences(
+                PREFS_BUGREPORT, Context.MODE_PRIVATE);
+        return prefs.getInt(KEY_WARNING_STATE, def);
+    }
+
+    public static void setWarningState(Context context, int value) {
+        final SharedPreferences prefs = context.getSharedPreferences(
+                PREFS_BUGREPORT, Context.MODE_PRIVATE);
+        prefs.edit().putInt(KEY_WARNING_STATE, value).apply();
+    }
+}