created FORCE_DEVICE_POLICY_MANAGER_LOG and CLEAR_FREEZE_PERIOD

Created the following new permissions and granted it to shell:
* FORCE_DEVICE_POLICY_MANAGER_LOG: will be used to expose
DPM#forceNetworkLogs and DPM#forceSecurityLogs as TestAPIs.
* CLEAR_FREEZE_PERIOD: will be used to expose
DPM#clearSystemUpdatePolicyFreezePeriodRecord as a TestAPI.

Bug: 180500227
Test: atest PermissionPolicyTest#platformPermissionPolicyIsUnaltered
Change-Id: I8a2a49aa45704d8991e9cf3689b5259442fb1db3
diff --git a/packages/Shell/AndroidManifest.xml b/packages/Shell/AndroidManifest.xml
index a15ceb6..b3b8280 100644
--- a/packages/Shell/AndroidManifest.xml
+++ b/packages/Shell/AndroidManifest.xml
@@ -124,6 +124,8 @@
     <uses-permission android:name="android.permission.MANAGE_CREDENTIAL_MANAGEMENT_APP" />
     <uses-permission android:name="android.permission.MANAGE_DEVICE_ADMINS" />
     <uses-permission android:name="android.permission.MANAGE_PROFILE_AND_DEVICE_OWNERS" />
+    <uses-permission android:name="android.permission.FORCE_DEVICE_POLICY_MANAGER_LOGS" />
+    <uses-permission android:name="android.permission.CLEAR_FREEZE_PERIOD" />
     <uses-permission android:name="android.permission.QUERY_USERS" />
     <uses-permission android:name="android.permission.MODIFY_QUIET_MODE" />
     <uses-permission android:name="android.permission.ACCESS_LOWPAN_STATE"/>